docker compose with compute-node build commands

2026-02-09 05:30:37 +00:00 · 2024-12-24 21:12:25 +00:00
174 changed files with 2662 additions and 6781 deletions
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -3,16 +3,6 @@
 # by the RUSTDOCFLAGS env var in CI.
 rustdocflags = ["-Arustdoc::private_intra_doc_links"]

-# Enable frame pointers. This may have a minor performance overhead, but makes it easier and more
-# efficient to obtain stack traces (and thus CPU/heap profiles). It may also avoid seg faults that
-# we've seen with libunwind-based profiling. See also:
-#
-# * <https://www.brendangregg.com/blog/2024-03-17/the-return-of-the-frame-pointers.html>
-# * <https://github.com/rust-lang/rust/pull/122646>
-#
-# NB: the RUSTFLAGS envvar will replace this. Make sure to update e.g. Dockerfile as well.
-rustflags = ["-Cforce-frame-pointers=yes"]
-
 [alias]
 build_testing = ["build", "--features", "testing"]
 neon = ["run", "--bin", "neon_local"]
--- a/.github/file-filters.yaml
+++ b/.github/file-filters.yaml
@@ -1,12 +0,0 @@
-rust_code: ['**/*.rs', '**/Cargo.toml', '**/Cargo.lock']
-
-v14: ['vendor/postgres-v14/**', 'Makefile', 'pgxn/**']
-v15: ['vendor/postgres-v15/**', 'Makefile', 'pgxn/**']
-v16: ['vendor/postgres-v16/**', 'Makefile', 'pgxn/**']
-v17: ['vendor/postgres-v17/**', 'Makefile', 'pgxn/**']
-
-rebuild_neon_extra:
-    - .github/workflows/neon_extra_builds.yml
-
-rebuild_macos:
-    - .github/workflows/build-macos.yml
--- a/.github/workflows/actionlint.yml
+++ b/.github/workflows/actionlint.yml
@@ -33,7 +33,7 @@ jobs:
          # SC2086 - Double quote to prevent globbing and word splitting. - https://www.shellcheck.net/wiki/SC2086
          SHELLCHECK_OPTS: --exclude=SC2046,SC2086
        with:
-          fail_level: error
+          fail_on_error: true
          filter_mode: nofilter
          level: error

--- a/.github/workflows/build-macos.yml
+++ b/.github/workflows/build-macos.yml
@@ -1,241 +0,0 @@
-name: Check neon with MacOS builds
-
-on:
-  workflow_call:
-    inputs:
-      pg_versions:
-        description: "Array of the pg versions to build for, for example: ['v14', 'v17']"
-        type: string
-        default: '[]'
-        required: false
-      rebuild_rust_code:
-        description: "Rebuild Rust code"
-        type: boolean
-        default: false
-        required: false
-      rebuild_everything:
-        description: "If true, rebuild for all versions"
-        type: boolean
-        default: false
-        required: false
-
-env:
-  RUST_BACKTRACE: 1
-  COPT: '-Werror'
-
-# TODO: move `check-*` and `files-changed` jobs to the "Caller" Workflow
-# We should care about that as Github has limitations:
-# - You can connect up to four levels of workflows
-# - You can call a maximum of 20 unique reusable workflows from a single workflow file.
-# https://docs.github.com/en/actions/sharing-automations/reusing-workflows#limitations
-jobs:
-  build-pgxn:
-    if: |
-      (inputs.pg_versions != '[]' || inputs.rebuild_everything) && (
-        contains(github.event.pull_request.labels.*.name, 'run-extra-build-macos')  ||
-        contains(github.event.pull_request.labels.*.name, 'run-extra-build-*') ||
-        github.ref_name == 'main'
-      )
-    timeout-minutes: 30
-    runs-on: macos-15
-    strategy:
-      matrix:
-        postgres-version: ${{ inputs.rebuild_everything && fromJson('["v14", "v15", "v16", "v17"]') || fromJSON(inputs.pg_versions) }}
-    env:
-      # Use release build only, to have less debug info around
-      # Hence keeping target/ (and general cache size) smaller
-      BUILD_TYPE: release
-    steps:
-      - name: Checkout main repo
-        uses: actions/checkout@v4
-
-      - name: Set pg ${{ matrix.postgres-version }} for caching
-        id: pg_rev
-        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-${{ matrix.postgres-version }}) | tee -a "${GITHUB_OUTPUT}"
-
-      - name: Cache postgres ${{ matrix.postgres-version }} build
-        id: cache_pg
-        uses: actions/cache@v4
-        with:
-          path: pg_install/${{ matrix.postgres-version }}
-          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-${{ matrix.postgres-version }}-${{ steps.pg_rev.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
-
-      - name: Checkout submodule vendor/postgres-${{ matrix.postgres-version }}
-        if: steps.cache_pg.outputs.cache-hit != 'true'
-        run: |
-          git submodule init vendor/postgres-${{ matrix.postgres-version }}
-          git submodule update --depth 1 --recursive
-
-      - name: Install build dependencies
-        if: steps.cache_pg.outputs.cache-hit != 'true'
-        run: |
-          brew install flex bison openssl protobuf icu4c
-
-      - name: Set extra env for macOS
-        if: steps.cache_pg.outputs.cache-hit != 'true'
-        run: |
-          echo 'LDFLAGS=-L/usr/local/opt/openssl@3/lib' >> $GITHUB_ENV
-          echo 'CPPFLAGS=-I/usr/local/opt/openssl@3/include' >> $GITHUB_ENV
-
-      - name: Build Postgres ${{ matrix.postgres-version }}
-        if: steps.cache_pg.outputs.cache-hit != 'true'
-        run: |
-          make postgres-${{ matrix.postgres-version }} -j$(sysctl -n hw.ncpu)
-
-      - name: Build Neon Pg Ext ${{ matrix.postgres-version }}
-        if: steps.cache_pg.outputs.cache-hit != 'true'
-        run: |
-          make "neon-pg-ext-${{ matrix.postgres-version }}" -j$(sysctl -n hw.ncpu)
-
-      - name: Get postgres headers ${{ matrix.postgres-version }}
-        if: steps.cache_pg.outputs.cache-hit != 'true'
-        run: |
-          make postgres-headers-${{ matrix.postgres-version }} -j$(sysctl -n hw.ncpu)
-
-  build-walproposer-lib:
-    if: |
-      (inputs.pg_versions != '[]' || inputs.rebuild_everything) && (
-        contains(github.event.pull_request.labels.*.name, 'run-extra-build-macos')  ||
-        contains(github.event.pull_request.labels.*.name, 'run-extra-build-*') ||
-        github.ref_name == 'main'
-      )
-    timeout-minutes: 30
-    runs-on: macos-15
-    needs: [build-pgxn]
-    env:
-      # Use release build only, to have less debug info around
-      # Hence keeping target/ (and general cache size) smaller
-      BUILD_TYPE: release
-    steps:
-      - name: Checkout main repo
-        uses: actions/checkout@v4
-
-      - name: Set pg v17 for caching
-        id: pg_rev
-        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v17) | tee -a "${GITHUB_OUTPUT}"
-
-      - name: Cache postgres v17 build
-        id: cache_pg
-        uses: actions/cache@v4
-        with:
-          path: pg_install/v17
-          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-v17-${{ steps.pg_rev.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
-
-      - name: Cache walproposer-lib
-        id: cache_walproposer_lib
-        uses: actions/cache@v4
-        with:
-          path: pg_install/build/walproposer-lib
-          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-walproposer_lib-v17-${{ steps.pg_rev.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
-
-      - name: Checkout submodule vendor/postgres-v17
-        if: steps.cache_walproposer_lib.outputs.cache-hit != 'true'
-        run: |
-          git submodule init vendor/postgres-v17
-          git submodule update --depth 1 --recursive
-
-      - name: Install build dependencies
-        if: steps.cache_walproposer_lib.outputs.cache-hit != 'true'
-        run: |
-          brew install flex bison openssl protobuf icu4c
-
-      - name: Set extra env for macOS
-        if: steps.cache_walproposer_lib.outputs.cache-hit != 'true'
-        run: |
-          echo 'LDFLAGS=-L/usr/local/opt/openssl@3/lib' >> $GITHUB_ENV
-          echo 'CPPFLAGS=-I/usr/local/opt/openssl@3/include' >> $GITHUB_ENV
-
-      - name: Build walproposer-lib (only for v17)
-        if: steps.cache_walproposer_lib.outputs.cache-hit != 'true'
-        run:
-          make walproposer-lib -j$(sysctl -n hw.ncpu)
-
-  cargo-build:
-    if: |
-      (inputs.pg_versions != '[]' || inputs.rebuild_rust_code || inputs.rebuild_everything) && (
-        contains(github.event.pull_request.labels.*.name, 'run-extra-build-macos')  ||
-        contains(github.event.pull_request.labels.*.name, 'run-extra-build-*') ||
-        github.ref_name == 'main'
-      )
-    timeout-minutes: 30
-    runs-on: macos-15
-    needs: [build-pgxn, build-walproposer-lib]
-    env:
-      # Use release build only, to have less debug info around
-      # Hence keeping target/ (and general cache size) smaller
-      BUILD_TYPE: release
-    steps:
-      - name: Checkout main repo
-        uses: actions/checkout@v4
-        with:
-          submodules: true
-
-      - name: Set pg v14 for caching
-        id: pg_rev_v14
-        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v14) | tee -a "${GITHUB_OUTPUT}"
-      - name: Set pg v15 for caching
-        id: pg_rev_v15
-        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v15) | tee -a "${GITHUB_OUTPUT}"
-      - name: Set pg v16 for caching
-        id: pg_rev_v16
-        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v16) | tee -a "${GITHUB_OUTPUT}"
-      - name: Set pg v17 for caching
-        id: pg_rev_v17
-        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v17) | tee -a "${GITHUB_OUTPUT}"
-
-      - name: Cache postgres v14 build
-        id: cache_pg
-        uses: actions/cache@v4
-        with:
-          path: pg_install/v14
-          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-v14-${{ steps.pg_rev_v14.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
-      - name: Cache postgres v15 build
-        id: cache_pg_v15
-        uses: actions/cache@v4
-        with:
-          path: pg_install/v15
-          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-v15-${{ steps.pg_rev_v15.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
-      - name: Cache postgres v16 build
-        id: cache_pg_v16
-        uses: actions/cache@v4
-        with:
-          path: pg_install/v16
-          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-v16-${{ steps.pg_rev_v16.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
-      - name: Cache postgres v17 build
-        id: cache_pg_v17
-        uses: actions/cache@v4
-        with:
-          path: pg_install/v17
-          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-v17-${{ steps.pg_rev_v17.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
-
-      - name: Cache cargo deps (only for v17)
-        uses: actions/cache@v4
-        with:
-          path: |
-            ~/.cargo/registry
-            !~/.cargo/registry/src
-            ~/.cargo/git
-            target
-          key: v1-${{ runner.os }}-${{ runner.arch }}-cargo-${{ hashFiles('./Cargo.lock') }}-${{ hashFiles('./rust-toolchain.toml') }}-rust
-
-      - name: Cache walproposer-lib
-        id: cache_walproposer_lib
-        uses: actions/cache@v4
-        with:
-          path: pg_install/build/walproposer-lib
-          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-walproposer_lib-v17-${{ steps.pg_rev_v17.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
-
-      - name: Install build dependencies
-        run: |
-          brew install flex bison openssl protobuf icu4c
-
-      - name: Set extra env for macOS
-        run: |
-          echo 'LDFLAGS=-L/usr/local/opt/openssl@3/lib' >> $GITHUB_ENV
-          echo 'CPPFLAGS=-I/usr/local/opt/openssl@3/include' >> $GITHUB_ENV
-
-      - name: Run cargo build (only for v17)
-        run: PQ_LIB_DIR=$(pwd)/pg_install/v17/lib cargo build --all --release -j$(sysctl -n hw.ncpu)
-
-      - name: Check that no warnings are produced (only for v17)
-        run: ./run_clippy.sh
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -212,7 +212,7 @@ jobs:
          fi
          echo "CLIPPY_COMMON_ARGS=${CLIPPY_COMMON_ARGS}" >> $GITHUB_ENV
      - name: Run cargo clippy (debug)
-        run: cargo hack --features default --ignore-unknown-features --feature-powerset clippy $CLIPPY_COMMON_ARGS
+        run: cargo hack --feature-powerset clippy $CLIPPY_COMMON_ARGS

      - name: Check documentation generation
        run: cargo doc --workspace --no-deps --document-private-items
@@ -538,7 +538,7 @@ jobs:

  trigger-e2e-tests:
    if: ${{ !github.event.pull_request.draft || contains( github.event.pull_request.labels.*.name, 'run-e2e-tests-in-draft') || github.ref_name == 'main' || github.ref_name == 'release' || github.ref_name == 'release-proxy' || github.ref_name == 'release-compute' }}
-    needs: [ check-permissions, promote-images-dev, tag ]
+    needs: [ check-permissions, promote-images, tag ]
    uses: ./.github/workflows/trigger-e2e-tests.yml
    secrets: inherit

@@ -930,8 +930,8 @@ jobs:
          docker compose -f ./docker-compose/docker-compose.yml logs || 0
          docker compose -f ./docker-compose/docker-compose.yml down

-  promote-images-dev:
-    needs: [ check-permissions, tag, vm-compute-node-image ]
+  promote-images:
+    needs: [ check-permissions, tag, test-images, vm-compute-node-image ]
    runs-on: ubuntu-22.04

    permissions:
@@ -965,35 +965,6 @@ jobs:
                                               neondatabase/vm-compute-node-${version}:${{ needs.tag.outputs.build-tag }}
          done

-  promote-images-prod:
-    needs: [ check-permissions, tag, test-images, vm-compute-node-image ]
-    runs-on: ubuntu-22.04
-    if: github.ref_name == 'main' || github.ref_name == 'release' || github.ref_name == 'release-proxy' || github.ref_name == 'release-compute'
-
-    permissions:
-      id-token: write # aws-actions/configure-aws-credentials
-      statuses: write
-      contents: read
-
-    env:
-      VERSIONS: v14 v15 v16 v17
-
-    steps:
-      - name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v4
-        with:
-          aws-region: eu-central-1
-          role-to-assume: ${{ vars.DEV_AWS_OIDC_ROLE_ARN }}
-          role-duration-seconds: 3600
-
-      - name: Login to Amazon Dev ECR
-        uses: aws-actions/amazon-ecr-login@v2
-
-      - uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.NEON_DOCKERHUB_USERNAME }}
-          password: ${{ secrets.NEON_DOCKERHUB_PASSWORD }}
-
      - name: Add latest tag to images
        if: github.ref_name == 'main'
        run: |
@@ -1039,7 +1010,7 @@ jobs:

  push-to-acr-dev:
    if: github.ref_name == 'main'
-    needs: [ tag, promote-images-dev ]
+    needs: [ tag, promote-images ]
    uses: ./.github/workflows/_push-to-acr.yml
    with:
      client_id: ${{ vars.AZURE_DEV_CLIENT_ID }}
@@ -1051,7 +1022,7 @@ jobs:

  push-to-acr-prod:
    if: github.ref_name == 'release' || github.ref_name == 'release-proxy' || github.ref_name == 'release-compute'
-    needs: [ tag, promote-images-prod ]
+    needs: [ tag, promote-images ]
    uses: ./.github/workflows/_push-to-acr.yml
    with:
      client_id: ${{ vars.AZURE_PROD_CLIENT_ID }}
@@ -1141,7 +1112,7 @@ jobs:
          exit 1

  deploy:
-    needs: [ check-permissions, promote-images-prod, tag, build-and-test-locally, trigger-custom-extensions-build-and-wait, push-to-acr-dev, push-to-acr-prod ]
+    needs: [ check-permissions, promote-images, tag, build-and-test-locally, trigger-custom-extensions-build-and-wait, push-to-acr-dev, push-to-acr-prod ]
    # `!failure() && !cancelled()` is required because the workflow depends on the job that can be skipped: `push-to-acr-dev` and `push-to-acr-prod`
    if: (github.ref_name == 'main' || github.ref_name == 'release' || github.ref_name == 'release-proxy' || github.ref_name == 'release-compute') && !failure() && !cancelled()
    permissions:
@@ -1362,7 +1333,7 @@ jobs:
          done

  pin-build-tools-image:
-    needs: [ build-build-tools-image, promote-images-prod, build-and-test-locally ]
+    needs: [ build-build-tools-image, promote-images, build-and-test-locally ]
    if: github.ref_name == 'main'
    uses: ./.github/workflows/pin-build-tools-image.yml
    with:
@@ -1385,7 +1356,7 @@ jobs:
      - build-and-test-locally
      - check-codestyle-python
      - check-codestyle-rust
-      - promote-images-dev
+      - promote-images
      - test-images
      - trigger-custom-extensions-build-and-wait
    runs-on: ubuntu-22.04
--- a/.github/workflows/neon_extra_builds.yml
+++ b/.github/workflows/neon_extra_builds.yml
@@ -31,15 +31,19 @@ jobs:
    uses: ./.github/workflows/build-build-tools-image.yml
    secrets: inherit

-  files-changed:
-    name: Detect what files changed
-    runs-on: ubuntu-22.04
-    timeout-minutes: 3
-    outputs:
-      v17: ${{ steps.files_changed.outputs.v17 }}
-      postgres_changes: ${{ steps.postgres_changes.outputs.changes }}
-      rebuild_rust_code: ${{ steps.files_changed.outputs.rust_code }}
-      rebuild_everything: ${{ steps.files_changed.outputs.rebuild_neon_extra || steps.files_changed.outputs.rebuild_macos }}
+  check-macos-build:
+    needs: [ check-permissions ]
+    if: |
+      contains(github.event.pull_request.labels.*.name, 'run-extra-build-macos')  ||
+      contains(github.event.pull_request.labels.*.name, 'run-extra-build-*') ||
+      github.ref_name == 'main'
+    timeout-minutes: 90
+    runs-on: macos-15
+
+    env:
+      # Use release build only, to have less debug info around
+      # Hence keeping target/ (and general cache size) smaller
+      BUILD_TYPE: release

    steps:
      - name: Checkout
@@ -47,45 +51,106 @@ jobs:
        with:
          submodules: true

-      - name: Check for Postgres changes
-        uses: dorny/paths-filter@1441771bbfdd59dcd748680ee64ebd8faab1a242  #v3
-        id: files_changed
+      - name: Install macOS postgres dependencies
+        run: brew install flex bison openssl protobuf icu4c
+
+      - name: Set pg 14 revision for caching
+        id: pg_v14_rev
+        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v14) >> $GITHUB_OUTPUT
+
+      - name: Set pg 15 revision for caching
+        id: pg_v15_rev
+        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v15) >> $GITHUB_OUTPUT
+
+      - name: Set pg 16 revision for caching
+        id: pg_v16_rev
+        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v16) >> $GITHUB_OUTPUT
+
+      - name: Set pg 17 revision for caching
+        id: pg_v17_rev
+        run: echo pg_rev=$(git rev-parse HEAD:vendor/postgres-v17) >> $GITHUB_OUTPUT
+
+      - name: Cache postgres v14 build
+        id: cache_pg_14
+        uses: actions/cache@v4
        with:
-          token: ${{ github.token }}
-          filters: .github/file-filters.yaml
-          base: ${{ github.event_name != 'pull_request' && (github.event.merge_group.base_ref || github.ref_name) || '' }}
-          ref: ${{ github.event_name != 'pull_request' && (github.event.merge_group.head_ref || github.ref) || '' }}
+          path: pg_install/v14
+          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-${{ steps.pg_v14_rev.outputs.pg_rev }}-${{ hashFiles('Makefile') }}

-      - name: Filter out only v-string for build matrix
-        id: postgres_changes
+      - name: Cache postgres v15 build
+        id: cache_pg_15
+        uses: actions/cache@v4
+        with:
+          path: pg_install/v15
+          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-${{ steps.pg_v15_rev.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
+
+      - name: Cache postgres v16 build
+        id: cache_pg_16
+        uses: actions/cache@v4
+        with:
+          path: pg_install/v16
+          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-${{ steps.pg_v16_rev.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
+
+      - name: Cache postgres v17 build
+        id: cache_pg_17
+        uses: actions/cache@v4
+        with:
+          path: pg_install/v17
+          key: v1-${{ runner.os }}-${{ runner.arch }}-${{ env.BUILD_TYPE }}-pg-${{ steps.pg_v17_rev.outputs.pg_rev }}-${{ hashFiles('Makefile') }}
+
+      - name: Set extra env for macOS
        run: |
-          v_strings_only_as_json_array=$(echo ${{ steps.files_changed.outputs.chnages }} | jq '.[]|select(test("v\\d+"))' | jq --slurp -c)
-          echo "changes=${v_strings_only_as_json_array}" | tee -a "${GITHUB_OUTPUT}"
+          echo 'LDFLAGS=-L/usr/local/opt/openssl@3/lib' >> $GITHUB_ENV
+          echo 'CPPFLAGS=-I/usr/local/opt/openssl@3/include' >> $GITHUB_ENV

-  check-macos-build:
-    needs: [ check-permissions, files-changed ]
-    if: |
-      contains(github.event.pull_request.labels.*.name, 'run-extra-build-macos')  ||
-      contains(github.event.pull_request.labels.*.name, 'run-extra-build-*') ||
-      github.ref_name == 'main'
-    uses: ./.github/workflows/build-macos.yml
-    with:
-      pg_versions: ${{ needs.files-changed.outputs.postgres_changes }}
-      rebuild_rust_code: ${{ needs.files-changed.outputs.rebuild_rust_code }}
-      rebuild_everything: ${{ fromJson(needs.files-changed.outputs.rebuild_everything) }}
+      - name: Cache cargo deps
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            !~/.cargo/registry/src
+            ~/.cargo/git
+            target
+          key: v1-${{ runner.os }}-${{ runner.arch }}-cargo-${{ hashFiles('./Cargo.lock') }}-${{ hashFiles('./rust-toolchain.toml') }}-rust
+
+      - name: Build postgres v14
+        if: steps.cache_pg_14.outputs.cache-hit != 'true'
+        run: make postgres-v14 -j$(sysctl -n hw.ncpu)
+
+      - name: Build postgres v15
+        if: steps.cache_pg_15.outputs.cache-hit != 'true'
+        run: make postgres-v15 -j$(sysctl -n hw.ncpu)
+
+      - name: Build postgres v16
+        if: steps.cache_pg_16.outputs.cache-hit != 'true'
+        run: make postgres-v16 -j$(sysctl -n hw.ncpu)
+
+      - name: Build postgres v17
+        if: steps.cache_pg_17.outputs.cache-hit != 'true'
+        run: make postgres-v17 -j$(sysctl -n hw.ncpu)
+
+      - name: Build neon extensions
+        run: make neon-pg-ext -j$(sysctl -n hw.ncpu)
+
+      - name: Build walproposer-lib
+        run: make walproposer-lib -j$(sysctl -n hw.ncpu)
+
+      - name: Run cargo build
+        run: PQ_LIB_DIR=$(pwd)/pg_install/v16/lib cargo build --all --release
+
+      - name: Check that no warnings are produced
+        run: ./run_clippy.sh

  gather-rust-build-stats:
-    needs: [ check-permissions, build-build-tools-image, files-changed ]
+    needs: [ check-permissions, build-build-tools-image ]
    permissions:
      id-token: write # aws-actions/configure-aws-credentials
      statuses: write
      contents: write
    if: |
-      (needs.files-changed.outputs.v17 == 'true' || needs.files-changed.outputs.rebuild_everything == 'true') && (
-        contains(github.event.pull_request.labels.*.name, 'run-extra-build-stats') ||
-        contains(github.event.pull_request.labels.*.name, 'run-extra-build-*') ||
-        github.ref_name == 'main'
-      )
+      contains(github.event.pull_request.labels.*.name, 'run-extra-build-stats') ||
+      contains(github.event.pull_request.labels.*.name, 'run-extra-build-*') ||
+      github.ref_name == 'main'
    runs-on: [ self-hosted, large ]
    container:
      image: ${{ needs.build-build-tools-image.outputs.image }}-bookworm
--- a/.github/workflows/trigger-e2e-tests.yml
+++ b/.github/workflows/trigger-e2e-tests.yml
@@ -68,7 +68,7 @@ jobs:
      GH_TOKEN: ${{ secrets.CI_ACCESS_TOKEN }}
      TAG: ${{ needs.tag.outputs.build-tag }}
    steps:
-      - name: Wait for `promote-images-dev` job to finish
+      - name: Wait for `promote-images` job to finish
        # It's important to have a timeout here, the script in the step can run infinitely
        timeout-minutes: 60
        run: |
@@ -79,17 +79,17 @@ jobs:
          # For PRs we use the run id as the tag
          BUILD_AND_TEST_RUN_ID=${TAG}
          while true; do
-            conclusion=$(gh run --repo ${GITHUB_REPOSITORY} view ${BUILD_AND_TEST_RUN_ID} --json jobs --jq '.jobs[] | select(.name == "promote-images-dev") | .conclusion')
+            conclusion=$(gh run --repo ${GITHUB_REPOSITORY} view ${BUILD_AND_TEST_RUN_ID} --json jobs --jq '.jobs[] | select(.name == "promote-images") | .conclusion')
            case "$conclusion" in
              success)
                break
                ;;
              failure | cancelled | skipped)
-                echo "The 'promote-images-dev' job didn't succeed: '${conclusion}'. Exiting..."
+                echo "The 'promote-images' job didn't succeed: '${conclusion}'. Exiting..."
                exit 1
                ;;
              *)
-                echo "The 'promote-images-dev' hasn't succeed yet. Waiting..."
+                echo "The 'promote-images' hasn't succeed yet. Waiting..."
                sleep 60
                ;;
            esac
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,5 @@ compaction-suite-results.*

 # pgindent typedef lists
 *.list
+
+venv/
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -718,13 +718,13 @@ dependencies = [

 [[package]]
 name = "axum"
-version = "0.7.9"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "edca88bc138befd0323b20752846e6587272d3b03b0343c8ea28a6f819e6e71f"
+checksum = "3a6c9af12842a67734c9a2e355436e5d03b22383ed60cf13cd0c18fbfe3dcbcf"
 dependencies = [
 "async-trait",
 "axum-core",
- "base64 0.22.1",
+ "base64 0.21.1",
 "bytes",
 "futures-util",
 "http 1.1.0",
@@ -746,8 +746,8 @@ dependencies = [
 "sha1",
 "sync_wrapper 1.0.1",
 "tokio",
- "tokio-tungstenite 0.24.0",
- "tower 0.5.2",
+ "tokio-tungstenite",
+ "tower",
 "tower-layer",
 "tower-service",
 "tracing",
@@ -1267,7 +1267,6 @@ dependencies = [
 "aws-config",
 "aws-sdk-kms",
 "aws-sdk-s3",
- "axum",
 "base64 0.13.1",
 "bytes",
 "camino",
@@ -1275,10 +1274,9 @@ dependencies = [
 "chrono",
 "clap",
 "compute_api",
- "fail",
 "flate2",
 "futures",
- "http 1.1.0",
+ "hyper 0.14.30",
 "metrics",
 "nix 0.27.1",
 "notify",
@@ -1304,8 +1302,6 @@ dependencies = [
 "tokio-postgres",
 "tokio-stream",
 "tokio-util",
- "tower 0.5.2",
- "tower-http",
 "tracing",
 "tracing-opentelemetry",
 "tracing-subscriber",
@@ -1653,20 +1649,6 @@ dependencies = [
 "parking_lot_core 0.9.8",
 ]

-[[package]]
-name = "dashmap"
-version = "6.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5041cc499144891f3790297212f32a74fb938e5136a14943f338ef9e0ae276cf"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
- "hashbrown 0.14.5",
- "lock_api",
- "once_cell",
- "parking_lot_core 0.9.8",
-]
-
 [[package]]
 name = "data-encoding"
 version = "2.4.0"
@@ -1750,9 +1732,9 @@ checksum = "ab03c107fafeb3ee9f5925686dbb7a73bc76e3932abb0d2b365cb64b169cf04c"

 [[package]]
 name = "diesel"
-version = "2.2.6"
+version = "2.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ccf1bedf64cdb9643204a36dd15b19a6ce8e7aa7f7b105868e9f1fad5ffa7d12"
+checksum = "65e13bab2796f412722112327f3e575601a3e9cdcbe426f0d30dbf43f3f5dc71"
 dependencies = [
 "bitflags 2.4.1",
 "byteorder",
@@ -1966,15 +1948,6 @@ dependencies = [
 "syn 2.0.90",
 ]

-[[package]]
-name = "env_filter"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "186e05a59d4c50738528153b83b0b0194d3a29507dfec16eccd4b342903397d0"
-dependencies = [
- "log",
-]
-
 [[package]]
 name = "env_logger"
 version = "0.10.2"
@@ -1988,16 +1961,6 @@ dependencies = [
 "termcolor",
 ]

-[[package]]
-name = "env_logger"
-version = "0.11.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c012a26a7f605efc424dd53697843a72be7dc86ad2d01f7814337794a12231d"
-dependencies = [
- "env_filter",
- "log",
-]
-
 [[package]]
 name = "equator"
 version = "0.2.2"
@@ -2756,7 +2719,7 @@ dependencies = [
 "pin-project-lite",
 "socket2",
 "tokio",
- "tower 0.4.13",
+ "tower",
 "tower-service",
 "tracing",
 ]
@@ -2981,28 +2944,6 @@ dependencies = [
 "str_stack",
 ]

-[[package]]
-name = "inferno"
-version = "0.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75a5d75fee4d36809e6b021e4b96b686e763d365ffdb03af2bd00786353f84fe"
-dependencies = [
- "ahash",
- "clap",
- "crossbeam-channel",
- "crossbeam-utils",
- "dashmap 6.1.0",
- "env_logger 0.11.2",
- "indexmap 2.0.1",
- "itoa",
- "log",
- "num-format",
- "once_cell",
- "quick-xml 0.37.1",
- "rgb",
- "str_stack",
-]
-
 [[package]]
 name = "inotify"
 version = "0.9.6"
@@ -3210,7 +3151,7 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4644821e1c3d7a560fe13d842d13f587c07348a1a05d3a797152d41c90c56df2"
 dependencies = [
- "dashmap 5.5.0",
+ "dashmap",
 "hashbrown 0.13.2",
 ]

@@ -3318,9 +3259,9 @@ checksum = "b87248edafb776e59e6ee64a79086f65890d3510f2c656c000bf2a7e8a0aea40"

 [[package]]
 name = "matchit"
-version = "0.8.4"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47e1ffaa40ddd1f3ed91f717a33c8c0ee23fff369e3aa8772b9605cc1d22f4c3"
+checksum = "540f1c43aed89909c0cc0cc604e3bb2f7e7a341a3728a9e6cfe760e733cd11ed"

 [[package]]
 name = "md-5"
@@ -3748,23 +3689,23 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"

 [[package]]
 name = "opentelemetry"
-version = "0.27.1"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab70038c28ed37b97d8ed414b6429d343a8bbf44c9f79ec854f3a643029ba6d7"
+checksum = "570074cc999d1a58184080966e5bd3bf3a9a4af650c3b05047c2621e7405cd17"
 dependencies = [
 "futures-core",
 "futures-sink",
 "js-sys",
+ "once_cell",
 "pin-project-lite",
 "thiserror",
- "tracing",
 ]

 [[package]]
 name = "opentelemetry-http"
-version = "0.27.0"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10a8a7f5f6ba7c1b286c2fbca0454eaba116f63bbe69ed250b642d36fbb04d80"
+checksum = "6351496aeaa49d7c267fb480678d85d1cd30c5edb20b497c48c56f62a8c14b99"
 dependencies = [
 "async-trait",
 "bytes",
@@ -3775,9 +3716,9 @@ dependencies = [

 [[package]]
 name = "opentelemetry-otlp"
-version = "0.27.0"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91cf61a1868dacc576bf2b2a1c3e9ab150af7272909e80085c3173384fe11f76"
+checksum = "29e1f9c8b032d4f635c730c0efcf731d5e2530ea13fa8bef7939ddc8420696bd"
 dependencies = [
 "async-trait",
 "futures-core",
@@ -3793,9 +3734,9 @@ dependencies = [

 [[package]]
 name = "opentelemetry-proto"
-version = "0.27.0"
+version = "0.26.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6e05acbfada5ec79023c85368af14abd0b307c015e9064d249b2a950ef459a6"
+checksum = "c9d3968ce3aefdcca5c27e3c4ea4391b37547726a70893aab52d3de95d5f8b34"
 dependencies = [
 "opentelemetry",
 "opentelemetry_sdk",
@@ -3805,21 +3746,22 @@ dependencies = [

 [[package]]
 name = "opentelemetry-semantic-conventions"
-version = "0.27.0"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc1b6902ff63b32ef6c489e8048c5e253e2e4a803ea3ea7e783914536eb15c52"
+checksum = "db945c1eaea8ac6a9677185357480d215bb6999faa9f691d0c4d4d641eab7a09"

 [[package]]
 name = "opentelemetry_sdk"
-version = "0.27.1"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "231e9d6ceef9b0b2546ddf52335785ce41252bc7474ee8ba05bfad277be13ab8"
+checksum = "d2c627d9f4c9cdc1f21a29ee4bfbd6028fcb8bcf2a857b43f3abdf72c9c862f3"
 dependencies = [
 "async-trait",
 "futures-channel",
 "futures-executor",
 "futures-util",
 "glob",
+ "once_cell",
 "opentelemetry",
 "percent-encoding",
 "rand 0.8.5",
@@ -3827,7 +3769,6 @@ dependencies = [
 "thiserror",
 "tokio",
 "tokio-stream",
- "tracing",
 ]

 [[package]]
@@ -4476,7 +4417,7 @@ dependencies = [
 "bytes",
 "crc32c",
 "criterion",
- "env_logger 0.10.2",
+ "env_logger",
 "log",
 "memoffset 0.9.0",
 "once_cell",
@@ -4517,7 +4458,7 @@ dependencies = [
 "cfg-if",
 "criterion",
 "findshlibs",
- "inferno 0.11.21",
+ "inferno",
 "libc",
 "log",
 "nix 0.26.4",
@@ -4552,9 +4493,9 @@ checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"

 [[package]]
 name = "pq-sys"
-version = "0.6.3"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6cc05d7ea95200187117196eee9edd0644424911821aeb28a18ce60ea0b8793"
+checksum = "31c0052426df997c0cbd30789eb44ca097e3541717a7b8fa36b1c464ee7edebd"
 dependencies = [
 "vcpkg",
 ]
@@ -4743,9 +4684,9 @@ dependencies = [
 "clap",
 "compute_api",
 "consumption_metrics",
- "dashmap 5.5.0",
+ "dashmap",
 "ecdsa 0.16.9",
- "env_logger 0.10.2",
+ "env_logger",
 "fallible-iterator",
 "flate2",
 "framed-websockets",
@@ -4816,7 +4757,7 @@ dependencies = [
 "tokio-postgres",
 "tokio-postgres2",
 "tokio-rustls 0.26.0",
- "tokio-tungstenite 0.21.0",
+ "tokio-tungstenite",
 "tokio-util",
 "tracing",
 "tracing-subscriber",
@@ -4852,15 +4793,6 @@ dependencies = [
 "serde",
 ]

-[[package]]
-name = "quick-xml"
-version = "0.37.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f22f29bdff3987b4d8632ef95fd6424ec7e4e0a57e2f4fc63e489e75357f6a03"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "quote"
 version = "1.0.37"
@@ -5245,15 +5177,15 @@ dependencies = [

 [[package]]
 name = "reqwest-tracing"
-version = "0.5.5"
+version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73e6153390585f6961341b50e5a1931d6be6dee4292283635903c26ef9d980d2"
+checksum = "ff82cf5730a1311fb9413b0bc2b8e743e0157cd73f010ab4ec374a923873b6a2"
 dependencies = [
 "anyhow",
 "async-trait",
 "getrandom 0.2.11",
 "http 1.1.0",
- "matchit 0.8.4",
+ "matchit 0.8.2",
 "opentelemetry",
 "reqwest",
 "reqwest-middleware",
@@ -6867,19 +6799,7 @@ dependencies = [
 "futures-util",
 "log",
 "tokio",
- "tungstenite 0.21.0",
-]
-
-[[package]]
-name = "tokio-tungstenite"
-version = "0.24.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "edc5f74e248dc973e0dbb7b74c7e0d6fcc301c694ff50049504004ef4d0cdcd9"
-dependencies = [
- "futures-util",
- "log",
- "tokio",
- "tungstenite 0.24.0",
+ "tungstenite",
 ]

 [[package]]
@@ -6960,7 +6880,7 @@ dependencies = [
 "tokio",
 "tokio-rustls 0.26.0",
 "tokio-stream",
- "tower 0.4.13",
+ "tower",
 "tower-layer",
 "tower-service",
 "tracing",
@@ -7000,50 +6920,17 @@ dependencies = [
 "tracing",
 ]

-[[package]]
-name = "tower"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d039ad9159c98b70ecfd540b2573b97f7f52c3e8d9f8ad57a24b916a536975f9"
-dependencies = [
- "futures-core",
- "futures-util",
- "pin-project-lite",
- "sync_wrapper 1.0.1",
- "tokio",
- "tower-layer",
- "tower-service",
- "tracing",
-]
-
-[[package]]
-name = "tower-http"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "403fa3b783d4b626a8ad51d766ab03cb6d2dbfc46b1c5d4448395e6628dc9697"
-dependencies = [
- "bitflags 2.4.1",
- "bytes",
- "http 1.1.0",
- "http-body 1.0.0",
- "pin-project-lite",
- "tower-layer",
- "tower-service",
- "tracing",
- "uuid",
-]
-
 [[package]]
 name = "tower-layer"
-version = "0.3.3"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "121c2a6cda46980bb0fcd1647ffaf6cd3fc79a013de288782836f6df9c48780e"
+checksum = "c20c8dbed6283a09604c3e69b4b7eeb54e298b8a600d4d5ecb5ad39de609f1d0"

 [[package]]
 name = "tower-service"
-version = "0.3.3"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3"
+checksum = "b6bc1c9ce2b5135ac7f93c72918fc37feb872bdc6a5533a8b85eb4b86bfdae52"

 [[package]]
 name = "tracing"
@@ -7112,9 +6999,9 @@ dependencies = [

 [[package]]
 name = "tracing-opentelemetry"
-version = "0.28.0"
+version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97a971f6058498b5c0f1affa23e7ea202057a7301dbff68e968b2d578bcbd053"
+checksum = "dc58af5d3f6c5811462cabb3289aec0093f7338e367e5a33d28c0433b3c7360b"
 dependencies = [
 "js-sys",
 "once_cell",
@@ -7198,24 +7085,6 @@ dependencies = [
 "utf-8",
 ]

-[[package]]
-name = "tungstenite"
-version = "0.24.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18e5b8366ee7a95b16d32197d0b2604b43a0be89dc5fac9f8e96ccafbaedda8a"
-dependencies = [
- "byteorder",
- "bytes",
- "data-encoding",
- "http 1.1.0",
- "httparse",
- "log",
- "rand 0.8.5",
- "sha1",
- "thiserror",
- "utf-8",
-]
-
 [[package]]
 name = "twox-hash"
 version = "1.6.3"
@@ -7383,7 +7252,6 @@ dependencies = [
 "hex-literal",
 "humantime",
 "hyper 0.14.30",
- "inferno 0.12.0",
 "itertools 0.10.5",
 "jemalloc_pprof",
 "jsonwebtoken",
@@ -7487,7 +7355,7 @@ dependencies = [
 "anyhow",
 "camino-tempfile",
 "clap",
- "env_logger 0.10.2",
+ "env_logger",
 "log",
 "postgres",
 "postgres_ffi",
@@ -7998,8 +7866,7 @@ dependencies = [
 "tokio-util",
 "toml_edit",
 "tonic",
- "tower 0.4.13",
- "tower 0.5.2",
+ "tower",
 "tracing",
 "tracing-core",
 "url",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -65,7 +65,7 @@ aws-smithy-types = "1.2"
 aws-credential-types = "1.2.0"
 aws-sigv4 = { version = "1.2", features = ["sign-http"] }
 aws-types = "1.3"
-axum = { version = "0.7.9", features = ["ws"] }
+axum = { version = "0.7.5", features = ["ws"] }
 base64 = "0.13.0"
 bincode = "1.3"
 bindgen = "0.70"
@@ -110,7 +110,6 @@ hyper-util = "0.1"
 tokio-tungstenite = "0.21.0"
 indexmap = "2"
 indoc = "2"
-inferno = "0.12.0"
 ipnet = "2.10.0"
 itertools = "0.10"
 itoa = "1.0.11"
@@ -127,16 +126,16 @@ notify = "6.0.0"
 num_cpus = "1.15"
 num-traits = "0.2.15"
 once_cell = "1.13"
-opentelemetry = "0.27"
-opentelemetry_sdk = "0.27"
-opentelemetry-otlp = { version = "0.27", default-features = false, features = ["http-proto", "trace", "http", "reqwest-client"] }
-opentelemetry-semantic-conventions = "0.27"
+opentelemetry = "0.26"
+opentelemetry_sdk = "0.26"
+opentelemetry-otlp = { version = "0.26", default-features=false, features = ["http-proto", "trace", "http", "reqwest-client"] }
+opentelemetry-semantic-conventions = "0.26"
 parking_lot = "0.12"
 parquet = { version = "53", default-features = false, features = ["zstd"] }
 parquet_derive = "53"
 pbkdf2 = { version = "0.12.1", features = ["simple", "std"] }
 pin-project-lite = "0.2"
-pprof = { version = "0.14", features = ["criterion", "flamegraph", "frame-pointer", "protobuf", "protobuf-codec"] }
+pprof = { version = "0.14", features = ["criterion", "flamegraph", "protobuf", "protobuf-codec"] }
 procfs = "0.16"
 prometheus = {version = "0.13", default-features=false, features = ["process"]} # removes protobuf dependency
 prost = "0.13"
@@ -144,7 +143,7 @@ rand = "0.8"
 redis = { version = "0.25.2", features = ["tokio-rustls-comp", "keep-alive"] }
 regex = "1.10.2"
 reqwest = { version = "0.12", default-features = false, features = ["rustls-tls"] }
-reqwest-tracing = { version = "0.5", features = ["opentelemetry_0_27"] }
+reqwest-tracing = { version = "0.5", features = ["opentelemetry_0_26"] }
 reqwest-middleware = "0.4"
 reqwest-retry = "0.7"
 routerify = "3"
@@ -188,12 +187,10 @@ tokio-util = { version = "0.7.10", features = ["io", "rt"] }
 toml = "0.8"
 toml_edit = "0.22"
 tonic = {version = "0.12.3", features = ["tls", "tls-roots"]}
-tower = { version = "0.5.2", default-features = false }
-tower-http = { version = "0.6.2", features = ["request-id", "trace"] }
-tower-service = "0.3.3"
+tower-service = "0.3.2"
 tracing = "0.1"
 tracing-error = "0.2"
-tracing-opentelemetry = "0.28"
+tracing-opentelemetry = "0.27"
 tracing-subscriber = { version = "0.3", default-features = false, features = ["smallvec", "fmt", "tracing-log", "std", "env-filter", "json"] }
 try-lock = "0.2.5"
 twox-hash = { version = "1.6.3", default-features = false }
@@ -269,8 +266,6 @@ tokio-postgres = { git = "https://github.com/neondatabase/rust-postgres.git", br
 [profile.release]
 # This is useful for profiling and, to some extent, debug.
 # Besides, debug info should not affect the performance.
-#
-# NB: we also enable frame pointers for improved profiling, see .cargo/config.toml.
 debug = true

 # disable debug symbols for all packages except this one to decrease binaries size
--- a/9
+++ b/9
@@ -45,7 +45,7 @@ COPY --chown=nonroot . .

 ARG ADDITIONAL_RUSTFLAGS
 RUN set -e \
-    && PQ_LIB_DIR=$(pwd)/pg_install/v${STABLE_PG_VERSION}/lib RUSTFLAGS="-Clinker=clang -Clink-arg=-fuse-ld=mold -Clink-arg=-Wl,--no-rosegment -Cforce-frame-pointers=yes ${ADDITIONAL_RUSTFLAGS}" cargo build \
+    && PQ_LIB_DIR=$(pwd)/pg_install/v${STABLE_PG_VERSION}/lib RUSTFLAGS="-Clinker=clang -Clink-arg=-fuse-ld=mold -Clink-arg=-Wl,--no-rosegment ${ADDITIONAL_RUSTFLAGS}" cargo build \
      --bin pg_sni_router  \
      --bin pageserver  \
      --bin pagectl  \
@@ -69,8 +69,6 @@ RUN set -e \
        libreadline-dev \
        libseccomp-dev \
        ca-certificates \
-	# System postgres for use with client libraries (e.g. in storage controller)
-        postgresql-15 \
    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
    && useradd -d /data neon \
    && chown -R neon:neon /data
@@ -103,6 +101,11 @@ RUN mkdir -p /data/.neon/ && \
  > /data/.neon/pageserver.toml && \
  chown -R neon:neon /data/.neon

+# When running a binary that links with libpq, default to using our most recent postgres version.  Binaries
+# that want a particular postgres version will select it explicitly: this is just a default.
+ENV LD_LIBRARY_PATH=/usr/local/v${DEFAULT_PG_VERSION}/lib
+
+
 VOLUME ["/data"]
 USER neon
 EXPOSE 6400
--- a/build-tools.Dockerfile
+++ b/build-tools.Dockerfile
@@ -258,7 +258,7 @@ WORKDIR /home/nonroot

 # Rust
 # Please keep the version of llvm (installed above) in sync with rust llvm (`rustc --version --verbose | grep LLVM`)
-ENV RUSTC_VERSION=1.84.0
+ENV RUSTC_VERSION=1.83.0
 ENV RUSTUP_HOME="/home/nonroot/.rustup"
 ENV PATH="/home/nonroot/.cargo/bin:${PATH}"
 ARG RUSTFILT_VERSION=0.2.1
--- a/compute/compute-node.Dockerfile
+++ b/compute/compute-node.Dockerfile
@@ -1167,13 +1167,22 @@ FROM rust-extensions-build AS pg-mooncake-build
 ARG PG_VERSION
 COPY --from=pg-build /usr/local/pgsql/ /usr/local/pgsql/

+# The topmost commit in the `neon` branch at the time of writing this
+# https://github.com/Mooncake-Labs/pg_mooncake/commits/neon/
+# https://github.com/Mooncake-Labs/pg_mooncake/commit/077c92c452bb6896a7b7776ee95f039984f076af
+ENV PG_MOONCAKE_VERSION=077c92c452bb6896a7b7776ee95f039984f076af
 ENV PATH="/usr/local/pgsql/bin/:$PATH"

-RUN wget https://github.com/Mooncake-Labs/pg_mooncake/releases/download/v0.1.0/pg_mooncake-0.1.0.tar.gz -O pg_mooncake.tar.gz && \
-    echo "eafd059b77f541f11525eb8affcd66a176968cbd8fe7c0d436e733f2aa4da59f pg_mooncake.tar.gz" | sha256sum --check && \
-    mkdir pg_mooncake-src && cd pg_mooncake-src && tar xzf ../pg_mooncake.tar.gz --strip-components=1 -C . && \
-    make release -j $(getconf _NPROCESSORS_ONLN) && \
-    make install -j $(getconf _NPROCESSORS_ONLN) && \
+RUN case "${PG_VERSION}" in \
+        'v14') \
+            echo "pg_mooncake is not supported on Postgres ${PG_VERSION}" && exit 0;; \
+    esac && \
+    git clone --depth 1 --branch neon https://github.com/Mooncake-Labs/pg_mooncake.git pg_mooncake-src && \
+    cd pg_mooncake-src && \
+    git checkout "${PG_MOONCAKE_VERSION}" && \
+    git submodule update --init --depth 1 --recursive && \
+    make BUILD_TYPE=release -j $(getconf _NPROCESSORS_ONLN) && \
+    make BUILD_TYPE=release -j $(getconf _NPROCESSORS_ONLN) install && \
    echo 'trusted = true' >> /usr/local/pgsql/share/extension/pg_mooncake.control

 #########################################################################################
@@ -1276,7 +1285,7 @@ RUN make -j $(getconf _NPROCESSORS_ONLN) \

 #########################################################################################
 #
-# Compile the Neon-specific `compute_ctl`, `fast_import`, and `local_proxy` binaries
+# Compile and run the Neon-specific `compute_ctl` and `fast_import` binaries
 #
 #########################################################################################
 FROM $REPOSITORY/$IMAGE:$TAG AS compute-tools
@@ -1286,7 +1295,7 @@ ENV BUILD_TAG=$BUILD_TAG
 USER nonroot
 # Copy entire project to get Cargo.* files with proper dependencies for the whole project
 COPY --chown=nonroot . .
-RUN mold -run cargo build --locked --profile release-line-debug-size-lto --bin compute_ctl --bin fast_import --bin local_proxy
+RUN cd compute_tools && mold -run cargo build --locked --profile release-line-debug-size-lto

 #########################################################################################
 #
@@ -1329,6 +1338,20 @@ RUN set -e \
    && make -j $(nproc) dist_man_MANS= \
    && make install dist_man_MANS=

+#########################################################################################
+#
+# Compile the Neon-specific `local_proxy` binary
+#
+#########################################################################################
+FROM $REPOSITORY/$IMAGE:$TAG AS local_proxy
+ARG BUILD_TAG
+ENV BUILD_TAG=$BUILD_TAG
+
+USER nonroot
+# Copy entire project to get Cargo.* files with proper dependencies for the whole project
+COPY --chown=nonroot . .
+RUN mold -run cargo build --locked --profile release-line-debug-size-lto --bin local_proxy
+
 #########################################################################################
 #
 # Layers "postgres-exporter" and "sql-exporter"
@@ -1468,7 +1491,7 @@ COPY --from=pgbouncer         /usr/local/pgbouncer/bin/pgbouncer /usr/local/bin/
 COPY --chmod=0666 --chown=postgres compute/etc/pgbouncer.ini /etc/pgbouncer.ini

 # local_proxy and its config
-COPY --from=compute-tools --chown=postgres /home/nonroot/target/release-line-debug-size-lto/local_proxy /usr/local/bin/local_proxy
+COPY --from=local_proxy --chown=postgres /home/nonroot/target/release-line-debug-size-lto/local_proxy /usr/local/bin/local_proxy
 RUN mkdir -p /etc/local_proxy && chown postgres:postgres /etc/local_proxy

 # Metrics exporter binaries and  configuration files
--- a/compute_tools/Cargo.toml
+++ b/compute_tools/Cargo.toml
@@ -7,7 +7,7 @@ license.workspace = true
 [features]
 default = []
 # Enables test specific features.
-testing = ["fail/failpoints"]
+testing = []

 [dependencies]
 base64.workspace = true
@@ -15,15 +15,13 @@ aws-config.workspace = true
 aws-sdk-s3.workspace = true
 aws-sdk-kms.workspace = true
 anyhow.workspace = true
-axum = { workspace = true, features = [] }
 camino.workspace = true
 chrono.workspace = true
 cfg-if.workspace = true
 clap.workspace = true
-fail.workspace = true
 flate2.workspace = true
 futures.workspace = true
-http.workspace = true
+hyper0 = { workspace = true, features = ["full"] }
 metrics.workspace = true
 nix.workspace = true
 notify.workspace = true
@@ -38,8 +36,6 @@ serde_with.workspace = true
 serde_json.workspace = true
 signal-hook.workspace = true
 tar.workspace = true
-tower.workspace = true
-tower-http.workspace = true
 reqwest = { workspace = true, features = ["json"] }
 tokio = { workspace = true, features = ["rt", "rt-multi-thread"] }
 tokio-postgres.workspace = true
--- a/compute_tools/src/bin/compute_ctl.rs
+++ b/compute_tools/src/bin/compute_ctl.rs
@@ -60,22 +60,19 @@ use compute_tools::compute::{
 };
 use compute_tools::configurator::launch_configurator;
 use compute_tools::extension_server::get_pg_version_string;
-use compute_tools::http::launch_http_server;
+use compute_tools::http::api::launch_http_server;
 use compute_tools::logger::*;
 use compute_tools::monitor::launch_monitor;
 use compute_tools::params::*;
 use compute_tools::spec::*;
 use compute_tools::swap::resize_swap;
 use rlimit::{setrlimit, Resource};
-use utils::failpoint_support;

 // this is an arbitrary build tag. Fine as a default / for testing purposes
 // in-case of not-set environment var
 const BUILD_TAG_DEFAULT: &str = "latest";

 fn main() -> Result<()> {
-    let scenario = failpoint_support::init();
-
    let (build_tag, clap_args) = init()?;

    // enable core dumping for all child processes
@@ -103,14 +100,17 @@ fn main() -> Result<()> {

    maybe_delay_exit(delay_exit);

-    scenario.teardown();
-
    deinit_and_exit(wait_pg_result);
 }

 fn init() -> Result<(String, clap::ArgMatches)> {
    init_tracing_and_logging(DEFAULT_LOG_LEVEL)?;

+    opentelemetry::global::set_error_handler(|err| {
+        tracing::info!("OpenTelemetry error: {err}");
+    })
+    .expect("global error handler lock poisoned");
+
    let mut signals = Signals::new([SIGINT, SIGTERM, SIGQUIT])?;
    thread::spawn(move || {
        for sig in signals.forever() {
@@ -419,14 +419,9 @@ fn start_postgres(
        "running compute with features: {:?}",
        state.pspec.as_ref().unwrap().spec.features
    );
-    // before we release the mutex, fetch some parameters for later.
-    let &ComputeSpec {
-        swap_size_bytes,
-        disk_quota_bytes,
-        #[cfg(target_os = "linux")]
-        disable_lfc_resizing,
-        ..
-    } = &state.pspec.as_ref().unwrap().spec;
+    // before we release the mutex, fetch the swap size (if any) for later.
+    let swap_size_bytes = state.pspec.as_ref().unwrap().spec.swap_size_bytes;
+    let disk_quota_bytes = state.pspec.as_ref().unwrap().spec.disk_quota_bytes;
    drop(state);

    // Launch remaining service threads
@@ -488,10 +483,7 @@ fn start_postgres(
    let mut pg = None;
    if !prestartup_failed {
        pg = match compute.start_compute() {
-            Ok(pg) => {
-                info!(postmaster_pid = %pg.0.id(), "Postgres was started");
-                Some(pg)
-            }
+            Ok(pg) => Some(pg),
            Err(err) => {
                error!("could not start the compute node: {:#}", err);
                compute.set_failed_status(err);
@@ -534,18 +526,11 @@ fn start_postgres(
            // This token is used internally by the monitor to clean up all threads
            let token = CancellationToken::new();

-            // don't pass postgres connection string to vm-monitor if we don't want it to resize LFC
-            let pgconnstr = if disable_lfc_resizing.unwrap_or(false) {
-                None
-            } else {
-                file_cache_connstr.cloned()
-            };
-
            let vm_monitor = rt.as_ref().map(|rt| {
                rt.spawn(vm_monitor::start(
                    Box::leak(Box::new(vm_monitor::Args {
                        cgroup: cgroup.cloned(),
-                        pgconnstr,
+                        pgconnstr: file_cache_connstr.cloned(),
                        addr: vm_monitor_addr.clone(),
                    })),
                    token.clone(),
@@ -589,8 +574,6 @@ fn wait_postgres(pg: Option<PostgresHandle>) -> Result<WaitPostgresResult> {
    // propagate to Postgres and it will be shut down as well.
    let mut exit_code = None;
    if let Some((mut pg, logs_handle)) = pg {
-        info!(postmaster_pid = %pg.id(), "Waiting for Postgres to exit");
-
        let ecode = pg
            .wait()
            .expect("failed to start waiting on Postgres process");
--- a/compute_tools/src/catalog.rs
+++ b/compute_tools/src/catalog.rs
@@ -36,11 +36,11 @@ pub async fn get_dbs_and_roles(compute: &Arc<ComputeNode>) -> anyhow::Result<Cat

 #[derive(Debug, thiserror::Error)]
 pub enum SchemaDumpError {
-    #[error("database does not exist")]
+    #[error("Database does not exist.")]
    DatabaseDoesNotExist,
-    #[error("failed to execute pg_dump")]
+    #[error("Failed to execute pg_dump.")]
    IO(#[from] std::io::Error),
-    #[error("unexpected I/O error")]
+    #[error("Unexpected error.")]
    Unexpected,
 }

--- a/compute_tools/src/compute.rs
+++ b/compute_tools/src/compute.rs
@@ -15,7 +15,7 @@ use std::time::Instant;

 use anyhow::{Context, Result};
 use chrono::{DateTime, Utc};
-use compute_api::spec::{Database, PgIdent, Role};
+use compute_api::spec::{PgIdent, Role};
 use futures::future::join_all;
 use futures::stream::FuturesUnordered;
 use futures::StreamExt;
@@ -45,10 +45,8 @@ use crate::spec_apply::ApplySpecPhase::{
    DropInvalidDatabases, DropRoles, HandleNeonExtension, HandleOtherExtensions,
    RenameAndDeleteDatabases, RenameRoles, RunInEachDatabase,
 };
-use crate::spec_apply::PerDatabasePhase;
 use crate::spec_apply::PerDatabasePhase::{
-    ChangeSchemaPerms, DeleteDBRoleReferences, DropSubscriptionsForDeletedDatabases,
-    HandleAnonExtension,
+    ChangeSchemaPerms, DeleteDBRoleReferences, HandleAnonExtension,
 };
 use crate::spec_apply::{apply_operations, MutableApplyContext, DB};
 use crate::sync_sk::{check_if_synced, ping_safekeeper};
@@ -836,7 +834,7 @@ impl ComputeNode {
        conf
    }

-    pub async fn get_maintenance_client(
+    async fn get_maintenance_client(
        conf: &tokio_postgres::Config,
    ) -> Result<tokio_postgres::Client> {
        let mut conf = conf.clone();
@@ -945,78 +943,6 @@ impl ComputeNode {
                dbs: databases,
            }));

-            // Apply special pre drop database phase.
-            // NOTE: we use the code of RunInEachDatabase phase for parallelism
-            // and connection management, but we don't really run it in *each* database,
-            // only in databases, we're about to drop.
-            info!("Applying PerDatabase (pre-dropdb) phase");
-            let concurrency_token = Arc::new(tokio::sync::Semaphore::new(concurrency));
-
-            // Run the phase for each database that we're about to drop.
-            let db_processes = spec
-                .delta_operations
-                .iter()
-                .flatten()
-                .filter_map(move |op| {
-                    if op.action.as_str() == "delete_db" {
-                        Some(op.name.clone())
-                    } else {
-                        None
-                    }
-                })
-                .map(|dbname| {
-                    let spec = spec.clone();
-                    let ctx = ctx.clone();
-                    let jwks_roles = jwks_roles.clone();
-                    let mut conf = conf.as_ref().clone();
-                    let concurrency_token = concurrency_token.clone();
-                    // We only need dbname field for this phase, so set other fields to dummy values
-                    let db = DB::UserDB(Database {
-                        name: dbname.clone(),
-                        owner: "cloud_admin".to_string(),
-                        options: None,
-                        restrict_conn: false,
-                        invalid: false,
-                    });
-
-                    debug!("Applying per-database phases for Database {:?}", &db);
-
-                    match &db {
-                        DB::SystemDB => {}
-                        DB::UserDB(db) => {
-                            conf.dbname(db.name.as_str());
-                        }
-                    }
-
-                    let conf = Arc::new(conf);
-                    let fut = Self::apply_spec_sql_db(
-                        spec.clone(),
-                        conf,
-                        ctx.clone(),
-                        jwks_roles.clone(),
-                        concurrency_token.clone(),
-                        db,
-                        [DropSubscriptionsForDeletedDatabases].to_vec(),
-                    );
-
-                    Ok(spawn(fut))
-                })
-                .collect::<Vec<Result<_, anyhow::Error>>>();
-
-            for process in db_processes.into_iter() {
-                let handle = process?;
-                if let Err(e) = handle.await? {
-                    // Handle the error case where the database does not exist
-                    // We do not check whether the DB exists or not in the deletion phase,
-                    // so we shouldn't be strict about it in pre-deletion cleanup as well.
-                    if e.to_string().contains("does not exist") {
-                        warn!("Error dropping subscription: {}", e);
-                    } else {
-                        return Err(e);
-                    }
-                };
-            }
-
            for phase in [
                CreateSuperUser,
                DropInvalidDatabases,
@@ -1036,7 +962,7 @@ impl ComputeNode {
                .await?;
            }

-            info!("Applying RunInEachDatabase2 phase");
+            info!("Applying RunInEachDatabase phase");
            let concurrency_token = Arc::new(tokio::sync::Semaphore::new(concurrency));

            let db_processes = spec
@@ -1071,12 +997,6 @@ impl ComputeNode {
                        jwks_roles.clone(),
                        concurrency_token.clone(),
                        db,
-                        [
-                            DeleteDBRoleReferences,
-                            ChangeSchemaPerms,
-                            HandleAnonExtension,
-                        ]
-                        .to_vec(),
                    );

                    Ok(spawn(fut))
@@ -1123,13 +1043,16 @@ impl ComputeNode {
        jwks_roles: Arc<HashSet<String>>,
        concurrency_token: Arc<tokio::sync::Semaphore>,
        db: DB,
-        subphases: Vec<PerDatabasePhase>,
    ) -> Result<()> {
        let _permit = concurrency_token.acquire().await?;

        let mut client_conn = None;

-        for subphase in subphases {
+        for subphase in [
+            DeleteDBRoleReferences,
+            ChangeSchemaPerms,
+            HandleAnonExtension,
+        ] {
            apply_operations(
                spec.clone(),
                ctx.clone(),
@@ -1258,19 +1181,8 @@ impl ComputeNode {
            let mut conf = postgres::config::Config::from(conf);
            conf.application_name("compute_ctl:migrations");

-            match conf.connect(NoTls) {
-                Ok(mut client) => {
-                    if let Err(e) = handle_migrations(&mut client) {
-                        error!("Failed to run migrations: {}", e);
-                    }
-                }
-                Err(e) => {
-                    error!(
-                        "Failed to connect to the compute for running migrations: {}",
-                        e
-                    );
-                }
-            };
+            let mut client = conf.connect(NoTls)?;
+            handle_migrations(&mut client).context("apply_config handle_migrations")
        });

        Ok::<(), anyhow::Error>(())
--- a/compute_tools/src/http/api.rs
+++ b/compute_tools/src/http/api.rs
@@ -0,0 +1,591 @@
+use std::convert::Infallible;
+use std::net::IpAddr;
+use std::net::Ipv6Addr;
+use std::net::SocketAddr;
+use std::sync::Arc;
+use std::thread;
+
+use crate::catalog::SchemaDumpError;
+use crate::catalog::{get_database_schema, get_dbs_and_roles};
+use crate::compute::forward_termination_signal;
+use crate::compute::{ComputeNode, ComputeState, ParsedSpec};
+use crate::installed_extensions;
+use compute_api::requests::{ConfigurationRequest, ExtensionInstallRequest, SetRoleGrantsRequest};
+use compute_api::responses::{
+    ComputeStatus, ComputeStatusResponse, ExtensionInstallResult, GenericAPIError,
+    SetRoleGrantsResponse,
+};
+
+use anyhow::Result;
+use hyper::header::CONTENT_TYPE;
+use hyper::service::{make_service_fn, service_fn};
+use hyper::{Body, Method, Request, Response, Server, StatusCode};
+use metrics::proto::MetricFamily;
+use metrics::Encoder;
+use metrics::TextEncoder;
+use tokio::task;
+use tracing::{debug, error, info, warn};
+use tracing_utils::http::OtelName;
+use utils::http::request::must_get_query_param;
+
+fn status_response_from_state(state: &ComputeState) -> ComputeStatusResponse {
+    ComputeStatusResponse {
+        start_time: state.start_time,
+        tenant: state
+            .pspec
+            .as_ref()
+            .map(|pspec| pspec.tenant_id.to_string()),
+        timeline: state
+            .pspec
+            .as_ref()
+            .map(|pspec| pspec.timeline_id.to_string()),
+        status: state.status,
+        last_active: state.last_active,
+        error: state.error.clone(),
+    }
+}
+
+// Service function to handle all available routes.
+async fn routes(req: Request<Body>, compute: &Arc<ComputeNode>) -> Response<Body> {
+    //
+    // NOTE: The URI path is currently included in traces. That's OK because
+    // it doesn't contain any variable parts or sensitive information. But
+    // please keep that in mind if you change the routing here.
+    //
+    match (req.method(), req.uri().path()) {
+        // Serialized compute state.
+        (&Method::GET, "/status") => {
+            debug!("serving /status GET request");
+            let state = compute.state.lock().unwrap();
+            let status_response = status_response_from_state(&state);
+            Response::new(Body::from(serde_json::to_string(&status_response).unwrap()))
+        }
+
+        // Startup metrics in JSON format. Keep /metrics reserved for a possible
+        // future use for Prometheus metrics format.
+        (&Method::GET, "/metrics.json") => {
+            info!("serving /metrics.json GET request");
+            let metrics = compute.state.lock().unwrap().metrics.clone();
+            Response::new(Body::from(serde_json::to_string(&metrics).unwrap()))
+        }
+
+        // Prometheus metrics
+        (&Method::GET, "/metrics") => {
+            debug!("serving /metrics GET request");
+
+            // When we call TextEncoder::encode() below, it will immediately
+            // return an error if a metric family has no metrics, so we need to
+            // preemptively filter out metric families with no metrics.
+            let metrics = installed_extensions::collect()
+                .into_iter()
+                .filter(|m| !m.get_metric().is_empty())
+                .collect::<Vec<MetricFamily>>();
+
+            let encoder = TextEncoder::new();
+            let mut buffer = vec![];
+
+            if let Err(err) = encoder.encode(&metrics, &mut buffer) {
+                let msg = format!("error handling /metrics request: {err}");
+                error!(msg);
+                return render_json_error(&msg, StatusCode::INTERNAL_SERVER_ERROR);
+            }
+
+            match Response::builder()
+                .status(StatusCode::OK)
+                .header(CONTENT_TYPE, encoder.format_type())
+                .body(Body::from(buffer))
+            {
+                Ok(response) => response,
+                Err(err) => {
+                    let msg = format!("error handling /metrics request: {err}");
+                    error!(msg);
+                    render_json_error(&msg, StatusCode::INTERNAL_SERVER_ERROR)
+                }
+            }
+        }
+        // Collect Postgres current usage insights
+        (&Method::GET, "/insights") => {
+            info!("serving /insights GET request");
+            let status = compute.get_status();
+            if status != ComputeStatus::Running {
+                let msg = format!("compute is not running, current status: {:?}", status);
+                error!(msg);
+                return Response::new(Body::from(msg));
+            }
+
+            let insights = compute.collect_insights().await;
+            Response::new(Body::from(insights))
+        }
+
+        (&Method::POST, "/check_writability") => {
+            info!("serving /check_writability POST request");
+            let status = compute.get_status();
+            if status != ComputeStatus::Running {
+                let msg = format!(
+                    "invalid compute status for check_writability request: {:?}",
+                    status
+                );
+                error!(msg);
+                return Response::new(Body::from(msg));
+            }
+
+            let res = crate::checker::check_writability(compute).await;
+            match res {
+                Ok(_) => Response::new(Body::from("true")),
+                Err(e) => {
+                    error!("check_writability failed: {}", e);
+                    Response::new(Body::from(e.to_string()))
+                }
+            }
+        }
+
+        (&Method::POST, "/extensions") => {
+            info!("serving /extensions POST request");
+            let status = compute.get_status();
+            if status != ComputeStatus::Running {
+                let msg = format!(
+                    "invalid compute status for extensions request: {:?}",
+                    status
+                );
+                error!(msg);
+                return render_json_error(&msg, StatusCode::PRECONDITION_FAILED);
+            }
+
+            let request = hyper::body::to_bytes(req.into_body()).await.unwrap();
+            let request = serde_json::from_slice::<ExtensionInstallRequest>(&request).unwrap();
+            let res = compute
+                .install_extension(&request.extension, &request.database, request.version)
+                .await;
+            match res {
+                Ok(version) => render_json(Body::from(
+                    serde_json::to_string(&ExtensionInstallResult {
+                        extension: request.extension,
+                        version,
+                    })
+                    .unwrap(),
+                )),
+                Err(e) => {
+                    error!("install_extension failed: {}", e);
+                    render_json_error(&e.to_string(), StatusCode::INTERNAL_SERVER_ERROR)
+                }
+            }
+        }
+
+        (&Method::GET, "/info") => {
+            let num_cpus = num_cpus::get_physical();
+            info!("serving /info GET request. num_cpus: {}", num_cpus);
+            Response::new(Body::from(
+                serde_json::json!({
+                    "num_cpus": num_cpus,
+                })
+                .to_string(),
+            ))
+        }
+
+        // Accept spec in JSON format and request compute configuration. If
+        // anything goes wrong after we set the compute status to `ConfigurationPending`
+        // and update compute state with new spec, we basically leave compute
+        // in the potentially wrong state. That said, it's control-plane's
+        // responsibility to watch compute state after reconfiguration request
+        // and to clean restart in case of errors.
+        (&Method::POST, "/configure") => {
+            info!("serving /configure POST request");
+            match handle_configure_request(req, compute).await {
+                Ok(msg) => Response::new(Body::from(msg)),
+                Err((msg, code)) => {
+                    error!("error handling /configure request: {msg}");
+                    render_json_error(&msg, code)
+                }
+            }
+        }
+
+        (&Method::POST, "/terminate") => {
+            info!("serving /terminate POST request");
+            match handle_terminate_request(compute).await {
+                Ok(()) => Response::new(Body::empty()),
+                Err((msg, code)) => {
+                    error!("error handling /terminate request: {msg}");
+                    render_json_error(&msg, code)
+                }
+            }
+        }
+
+        (&Method::GET, "/dbs_and_roles") => {
+            info!("serving /dbs_and_roles GET request",);
+            match get_dbs_and_roles(compute).await {
+                Ok(res) => render_json(Body::from(serde_json::to_string(&res).unwrap())),
+                Err(_) => {
+                    render_json_error("can't get dbs and roles", StatusCode::INTERNAL_SERVER_ERROR)
+                }
+            }
+        }
+
+        (&Method::GET, "/database_schema") => {
+            let database = match must_get_query_param(&req, "database") {
+                Err(e) => return e.into_response(),
+                Ok(database) => database,
+            };
+            info!("serving /database_schema GET request with database: {database}",);
+            match get_database_schema(compute, &database).await {
+                Ok(res) => render_plain(Body::wrap_stream(res)),
+                Err(SchemaDumpError::DatabaseDoesNotExist) => {
+                    render_json_error("database does not exist", StatusCode::NOT_FOUND)
+                }
+                Err(e) => {
+                    error!("can't get schema dump: {}", e);
+                    render_json_error("can't get schema dump", StatusCode::INTERNAL_SERVER_ERROR)
+                }
+            }
+        }
+
+        (&Method::POST, "/grants") => {
+            info!("serving /grants POST request");
+            let status = compute.get_status();
+            if status != ComputeStatus::Running {
+                let msg = format!(
+                    "invalid compute status for set_role_grants request: {:?}",
+                    status
+                );
+                error!(msg);
+                return render_json_error(&msg, StatusCode::PRECONDITION_FAILED);
+            }
+
+            let request = hyper::body::to_bytes(req.into_body()).await.unwrap();
+            let request = serde_json::from_slice::<SetRoleGrantsRequest>(&request).unwrap();
+
+            let res = compute
+                .set_role_grants(
+                    &request.database,
+                    &request.schema,
+                    &request.privileges,
+                    &request.role,
+                )
+                .await;
+            match res {
+                Ok(()) => render_json(Body::from(
+                    serde_json::to_string(&SetRoleGrantsResponse {
+                        database: request.database,
+                        schema: request.schema,
+                        role: request.role,
+                        privileges: request.privileges,
+                    })
+                    .unwrap(),
+                )),
+                Err(e) => render_json_error(
+                    &format!("could not grant role privileges to the schema: {e}"),
+                    // TODO: can we filter on role/schema not found errors
+                    // and return appropriate error code?
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                ),
+            }
+        }
+
+        // get the list of installed extensions
+        // currently only used in python tests
+        // TODO: call it from cplane
+        (&Method::GET, "/installed_extensions") => {
+            info!("serving /installed_extensions GET request");
+            let status = compute.get_status();
+            if status != ComputeStatus::Running {
+                let msg = format!(
+                    "invalid compute status for extensions request: {:?}",
+                    status
+                );
+                error!(msg);
+                return Response::new(Body::from(msg));
+            }
+
+            let conf = compute.get_conn_conf(None);
+            let res =
+                task::spawn_blocking(move || installed_extensions::get_installed_extensions(conf))
+                    .await
+                    .unwrap();
+
+            match res {
+                Ok(res) => render_json(Body::from(serde_json::to_string(&res).unwrap())),
+                Err(e) => render_json_error(
+                    &format!("could not get list of installed extensions: {}", e),
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                ),
+            }
+        }
+
+        // download extension files from remote extension storage on demand
+        (&Method::POST, route) if route.starts_with("/extension_server/") => {
+            info!("serving {:?} POST request", route);
+            info!("req.uri {:?}", req.uri());
+
+            // don't even try to download extensions
+            // if no remote storage is configured
+            if compute.ext_remote_storage.is_none() {
+                info!("no extensions remote storage configured");
+                let mut resp = Response::new(Body::from("no remote storage configured"));
+                *resp.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
+                return resp;
+            }
+
+            let mut is_library = false;
+            if let Some(params) = req.uri().query() {
+                info!("serving {:?} POST request with params: {}", route, params);
+                if params == "is_library=true" {
+                    is_library = true;
+                } else {
+                    let mut resp = Response::new(Body::from("Wrong request parameters"));
+                    *resp.status_mut() = StatusCode::BAD_REQUEST;
+                    return resp;
+                }
+            }
+            let filename = route.split('/').last().unwrap().to_string();
+            info!("serving /extension_server POST request, filename: {filename:?} is_library: {is_library}");
+
+            // get ext_name and path from spec
+            // don't lock compute_state for too long
+            let ext = {
+                let compute_state = compute.state.lock().unwrap();
+                let pspec = compute_state.pspec.as_ref().expect("spec must be set");
+                let spec = &pspec.spec;
+
+                // debug only
+                info!("spec: {:?}", spec);
+
+                let remote_extensions = match spec.remote_extensions.as_ref() {
+                    Some(r) => r,
+                    None => {
+                        info!("no remote extensions spec was provided");
+                        let mut resp = Response::new(Body::from("no remote storage configured"));
+                        *resp.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
+                        return resp;
+                    }
+                };
+
+                remote_extensions.get_ext(
+                    &filename,
+                    is_library,
+                    &compute.build_tag,
+                    &compute.pgversion,
+                )
+            };
+
+            match ext {
+                Ok((ext_name, ext_path)) => {
+                    match compute.download_extension(ext_name, ext_path).await {
+                        Ok(_) => Response::new(Body::from("OK")),
+                        Err(e) => {
+                            error!("extension download failed: {}", e);
+                            let mut resp = Response::new(Body::from(e.to_string()));
+                            *resp.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
+                            resp
+                        }
+                    }
+                }
+                Err(e) => {
+                    warn!("extension download failed to find extension: {}", e);
+                    let mut resp = Response::new(Body::from("failed to find file"));
+                    *resp.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
+                    resp
+                }
+            }
+        }
+
+        // Return the `404 Not Found` for any other routes.
+        _ => {
+            let mut not_found = Response::new(Body::from("404 Not Found"));
+            *not_found.status_mut() = StatusCode::NOT_FOUND;
+            not_found
+        }
+    }
+}
+
+async fn handle_configure_request(
+    req: Request<Body>,
+    compute: &Arc<ComputeNode>,
+) -> Result<String, (String, StatusCode)> {
+    if !compute.live_config_allowed {
+        return Err((
+            "live configuration is not allowed for this compute node".to_string(),
+            StatusCode::PRECONDITION_FAILED,
+        ));
+    }
+
+    let body_bytes = hyper::body::to_bytes(req.into_body()).await.unwrap();
+    let spec_raw = String::from_utf8(body_bytes.to_vec()).unwrap();
+    if let Ok(request) = serde_json::from_str::<ConfigurationRequest>(&spec_raw) {
+        let spec = request.spec;
+
+        let parsed_spec = match ParsedSpec::try_from(spec) {
+            Ok(ps) => ps,
+            Err(msg) => return Err((msg, StatusCode::BAD_REQUEST)),
+        };
+
+        // XXX: wrap state update under lock in code blocks. Otherwise,
+        // we will try to `Send` `mut state` into the spawned thread
+        // bellow, which will cause error:
+        // ```
+        // error: future cannot be sent between threads safely
+        // ```
+        {
+            let mut state = compute.state.lock().unwrap();
+            if state.status != ComputeStatus::Empty && state.status != ComputeStatus::Running {
+                let msg = format!(
+                    "invalid compute status for configuration request: {:?}",
+                    state.status.clone()
+                );
+                return Err((msg, StatusCode::PRECONDITION_FAILED));
+            }
+            state.pspec = Some(parsed_spec);
+            state.set_status(ComputeStatus::ConfigurationPending, &compute.state_changed);
+            drop(state);
+            info!("set new spec and notified waiters");
+        }
+
+        // Spawn a blocking thread to wait for compute to become Running.
+        // This is needed to do not block the main pool of workers and
+        // be able to serve other requests while some particular request
+        // is waiting for compute to finish configuration.
+        let c = compute.clone();
+        task::spawn_blocking(move || {
+            let mut state = c.state.lock().unwrap();
+            while state.status != ComputeStatus::Running {
+                state = c.state_changed.wait(state).unwrap();
+                info!(
+                    "waiting for compute to become Running, current status: {:?}",
+                    state.status
+                );
+
+                if state.status == ComputeStatus::Failed {
+                    let err = state.error.as_ref().map_or("unknown error", |x| x);
+                    let msg = format!("compute configuration failed: {:?}", err);
+                    return Err((msg, StatusCode::INTERNAL_SERVER_ERROR));
+                }
+            }
+
+            Ok(())
+        })
+        .await
+        .unwrap()?;
+
+        // Return current compute state if everything went well.
+        let state = compute.state.lock().unwrap().clone();
+        let status_response = status_response_from_state(&state);
+        Ok(serde_json::to_string(&status_response).unwrap())
+    } else {
+        Err(("invalid spec".to_string(), StatusCode::BAD_REQUEST))
+    }
+}
+
+fn render_json_error(e: &str, status: StatusCode) -> Response<Body> {
+    let error = GenericAPIError {
+        error: e.to_string(),
+    };
+    Response::builder()
+        .status(status)
+        .header(CONTENT_TYPE, "application/json")
+        .body(Body::from(serde_json::to_string(&error).unwrap()))
+        .unwrap()
+}
+
+fn render_json(body: Body) -> Response<Body> {
+    Response::builder()
+        .header(CONTENT_TYPE, "application/json")
+        .body(body)
+        .unwrap()
+}
+
+fn render_plain(body: Body) -> Response<Body> {
+    Response::builder()
+        .header(CONTENT_TYPE, "text/plain")
+        .body(body)
+        .unwrap()
+}
+
+async fn handle_terminate_request(compute: &Arc<ComputeNode>) -> Result<(), (String, StatusCode)> {
+    {
+        let mut state = compute.state.lock().unwrap();
+        if state.status == ComputeStatus::Terminated {
+            return Ok(());
+        }
+        if state.status != ComputeStatus::Empty && state.status != ComputeStatus::Running {
+            let msg = format!(
+                "invalid compute status for termination request: {}",
+                state.status
+            );
+            return Err((msg, StatusCode::PRECONDITION_FAILED));
+        }
+        state.set_status(ComputeStatus::TerminationPending, &compute.state_changed);
+        drop(state);
+    }
+
+    forward_termination_signal();
+    info!("sent signal and notified waiters");
+
+    // Spawn a blocking thread to wait for compute to become Terminated.
+    // This is needed to do not block the main pool of workers and
+    // be able to serve other requests while some particular request
+    // is waiting for compute to finish configuration.
+    let c = compute.clone();
+    task::spawn_blocking(move || {
+        let mut state = c.state.lock().unwrap();
+        while state.status != ComputeStatus::Terminated {
+            state = c.state_changed.wait(state).unwrap();
+            info!(
+                "waiting for compute to become {}, current status: {:?}",
+                ComputeStatus::Terminated,
+                state.status
+            );
+        }
+
+        Ok(())
+    })
+    .await
+    .unwrap()?;
+    info!("terminated Postgres");
+    Ok(())
+}
+
+// Main Hyper HTTP server function that runs it and blocks waiting on it forever.
+#[tokio::main]
+async fn serve(port: u16, state: Arc<ComputeNode>) {
+    // this usually binds to both IPv4 and IPv6 on linux
+    // see e.g. https://github.com/rust-lang/rust/pull/34440
+    let addr = SocketAddr::new(IpAddr::from(Ipv6Addr::UNSPECIFIED), port);
+
+    let make_service = make_service_fn(move |_conn| {
+        let state = state.clone();
+        async move {
+            Ok::<_, Infallible>(service_fn(move |req: Request<Body>| {
+                let state = state.clone();
+                async move {
+                    Ok::<_, Infallible>(
+                        // NOTE: We include the URI path in the string. It
+                        // doesn't contain any variable parts or sensitive
+                        // information in this API.
+                        tracing_utils::http::tracing_handler(
+                            req,
+                            |req| routes(req, &state),
+                            OtelName::UriPath,
+                        )
+                        .await,
+                    )
+                }
+            }))
+        }
+    });
+
+    info!("starting HTTP server on {}", addr);
+
+    let server = Server::bind(&addr).serve(make_service);
+
+    // Run this server forever
+    if let Err(e) = server.await {
+        error!("server error: {}", e);
+    }
+}
+
+/// Launch a separate Hyper HTTP API server thread and return its `JoinHandle`.
+pub fn launch_http_server(port: u16, state: &Arc<ComputeNode>) -> Result<thread::JoinHandle<()>> {
+    let state = Arc::clone(state);
+
+    Ok(thread::Builder::new()
+        .name("http-endpoint".into())
+        .spawn(move || serve(port, state))?)
+}
--- a/compute_tools/src/http/extract/json.rs
+++ b/compute_tools/src/http/extract/json.rs
@@ -1,48 +0,0 @@
-use std::ops::{Deref, DerefMut};
-
-use axum::{
-    async_trait,
-    extract::{rejection::JsonRejection, FromRequest, Request},
-};
-use compute_api::responses::GenericAPIError;
-use http::StatusCode;
-
-/// Custom `Json` extractor, so that we can format errors into
-/// `JsonResponse<GenericAPIError>`.
-#[derive(Debug, Clone, Copy, Default)]
-pub(crate) struct Json<T>(pub T);
-
-#[async_trait]
-impl<S, T> FromRequest<S> for Json<T>
-where
-    axum::Json<T>: FromRequest<S, Rejection = JsonRejection>,
-    S: Send + Sync,
-{
-    type Rejection = (StatusCode, axum::Json<GenericAPIError>);
-
-    async fn from_request(req: Request, state: &S) -> Result<Self, Self::Rejection> {
-        match axum::Json::<T>::from_request(req, state).await {
-            Ok(value) => Ok(Self(value.0)),
-            Err(rejection) => Err((
-                rejection.status(),
-                axum::Json(GenericAPIError {
-                    error: rejection.body_text().to_lowercase(),
-                }),
-            )),
-        }
-    }
-}
-
-impl<T> Deref for Json<T> {
-    type Target = T;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl<T> DerefMut for Json<T> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
--- a/compute_tools/src/http/extract/mod.rs
+++ b/compute_tools/src/http/extract/mod.rs
@@ -1,7 +0,0 @@
-pub(crate) mod json;
-pub(crate) mod path;
-pub(crate) mod query;
-
-pub(crate) use json::Json;
-pub(crate) use path::Path;
-pub(crate) use query::Query;
--- a/compute_tools/src/http/extract/path.rs
+++ b/compute_tools/src/http/extract/path.rs
@@ -1,48 +0,0 @@
-use std::ops::{Deref, DerefMut};
-
-use axum::{
-    async_trait,
-    extract::{rejection::PathRejection, FromRequestParts},
-};
-use compute_api::responses::GenericAPIError;
-use http::{request::Parts, StatusCode};
-
-/// Custom `Path` extractor, so that we can format errors into
-/// `JsonResponse<GenericAPIError>`.
-#[derive(Debug, Clone, Copy, Default)]
-pub(crate) struct Path<T>(pub T);
-
-#[async_trait]
-impl<S, T> FromRequestParts<S> for Path<T>
-where
-    axum::extract::Path<T>: FromRequestParts<S, Rejection = PathRejection>,
-    S: Send + Sync,
-{
-    type Rejection = (StatusCode, axum::Json<GenericAPIError>);
-
-    async fn from_request_parts(parts: &mut Parts, state: &S) -> Result<Self, Self::Rejection> {
-        match axum::extract::Path::<T>::from_request_parts(parts, state).await {
-            Ok(value) => Ok(Self(value.0)),
-            Err(rejection) => Err((
-                rejection.status(),
-                axum::Json(GenericAPIError {
-                    error: rejection.body_text().to_ascii_lowercase(),
-                }),
-            )),
-        }
-    }
-}
-
-impl<T> Deref for Path<T> {
-    type Target = T;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl<T> DerefMut for Path<T> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
--- a/compute_tools/src/http/extract/query.rs
+++ b/compute_tools/src/http/extract/query.rs
@@ -1,48 +0,0 @@
-use std::ops::{Deref, DerefMut};
-
-use axum::{
-    async_trait,
-    extract::{rejection::QueryRejection, FromRequestParts},
-};
-use compute_api::responses::GenericAPIError;
-use http::{request::Parts, StatusCode};
-
-/// Custom `Query` extractor, so that we can format errors into
-/// `JsonResponse<GenericAPIError>`.
-#[derive(Debug, Clone, Copy, Default)]
-pub(crate) struct Query<T>(pub T);
-
-#[async_trait]
-impl<S, T> FromRequestParts<S> for Query<T>
-where
-    axum::extract::Query<T>: FromRequestParts<S, Rejection = QueryRejection>,
-    S: Send + Sync,
-{
-    type Rejection = (StatusCode, axum::Json<GenericAPIError>);
-
-    async fn from_request_parts(parts: &mut Parts, state: &S) -> Result<Self, Self::Rejection> {
-        match axum::extract::Query::<T>::from_request_parts(parts, state).await {
-            Ok(value) => Ok(Self(value.0)),
-            Err(rejection) => Err((
-                rejection.status(),
-                axum::Json(GenericAPIError {
-                    error: rejection.body_text().to_ascii_lowercase(),
-                }),
-            )),
-        }
-    }
-}
-
-impl<T> Deref for Query<T> {
-    type Target = T;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl<T> DerefMut for Query<T> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
--- a/compute_tools/src/http/mod.rs
+++ b/compute_tools/src/http/mod.rs
@@ -1,56 +1 @@
-use axum::{body::Body, response::Response};
-use compute_api::responses::{ComputeStatus, GenericAPIError};
-use http::{header::CONTENT_TYPE, StatusCode};
-use serde::Serialize;
-use tracing::error;
-
-pub use server::launch_http_server;
-
-mod extract;
-mod routes;
-mod server;
-
-/// Convenience response builder for JSON responses
-struct JsonResponse;
-
-impl JsonResponse {
-    /// Helper for actually creating a response
-    fn create_response(code: StatusCode, body: impl Serialize) -> Response {
-        Response::builder()
-            .status(code)
-            .header(CONTENT_TYPE.as_str(), "application/json")
-            .body(Body::from(serde_json::to_string(&body).unwrap()))
-            .unwrap()
-    }
-
-    /// Create a successful error response
-    pub(self) fn success(code: StatusCode, body: impl Serialize) -> Response {
-        assert!({
-            let code = code.as_u16();
-
-            (200..300).contains(&code)
-        });
-
-        Self::create_response(code, body)
-    }
-
-    /// Create an error response
-    pub(self) fn error(code: StatusCode, error: impl ToString) -> Response {
-        assert!(code.as_u16() >= 400);
-
-        let message = error.to_string();
-        error!(message);
-
-        Self::create_response(code, &GenericAPIError { error: message })
-    }
-
-    /// Create an error response related to the compute being in an invalid state
-    pub(self) fn invalid_status(status: ComputeStatus) -> Response {
-        Self::create_response(
-            StatusCode::PRECONDITION_FAILED,
-            &GenericAPIError {
-                error: format!("invalid compute status: {status}"),
-            },
-        )
-    }
-}
+pub mod api;
--- a/compute_tools/src/http/openapi_spec.yaml
+++ b/compute_tools/src/http/openapi_spec.yaml
@@ -37,7 +37,7 @@ paths:
              schema:
                $ref: "#/components/schemas/ComputeMetrics"

-  /metrics:
+  /metrics
    get:
      tags:
      - Info
--- a/compute_tools/src/http/routes/check_writability.rs
+++ b/compute_tools/src/http/routes/check_writability.rs
@@ -1,20 +0,0 @@
-use std::sync::Arc;
-
-use axum::{extract::State, response::Response};
-use compute_api::responses::ComputeStatus;
-use http::StatusCode;
-
-use crate::{checker::check_writability, compute::ComputeNode, http::JsonResponse};
-
-/// Check that the compute is currently running.
-pub(in crate::http) async fn is_writable(State(compute): State<Arc<ComputeNode>>) -> Response {
-    let status = compute.get_status();
-    if status != ComputeStatus::Running {
-        return JsonResponse::invalid_status(status);
-    }
-
-    match check_writability(&compute).await {
-        Ok(_) => JsonResponse::success(StatusCode::OK, true),
-        Err(e) => JsonResponse::error(StatusCode::INTERNAL_SERVER_ERROR, e),
-    }
-}
--- a/compute_tools/src/http/routes/configure.rs
+++ b/compute_tools/src/http/routes/configure.rs
@@ -1,91 +0,0 @@
-use std::sync::Arc;
-
-use axum::{extract::State, response::Response};
-use compute_api::{
-    requests::ConfigurationRequest,
-    responses::{ComputeStatus, ComputeStatusResponse},
-};
-use http::StatusCode;
-use tokio::task;
-use tracing::info;
-
-use crate::{
-    compute::{ComputeNode, ParsedSpec},
-    http::{extract::Json, JsonResponse},
-};
-
-// Accept spec in JSON format and request compute configuration. If anything
-// goes wrong after we set the compute status to `ConfigurationPending` and
-// update compute state with new spec, we basically leave compute in the
-// potentially wrong state. That said, it's control-plane's responsibility to
-// watch compute state after reconfiguration request and to clean restart in
-// case of errors.
-pub(in crate::http) async fn configure(
-    State(compute): State<Arc<ComputeNode>>,
-    request: Json<ConfigurationRequest>,
-) -> Response {
-    if !compute.live_config_allowed {
-        return JsonResponse::error(
-            StatusCode::PRECONDITION_FAILED,
-            "live configuration is not allowed for this compute node".to_string(),
-        );
-    }
-
-    let pspec = match ParsedSpec::try_from(request.spec.clone()) {
-        Ok(p) => p,
-        Err(e) => return JsonResponse::error(StatusCode::BAD_REQUEST, e),
-    };
-
-    // XXX: wrap state update under lock in a code block. Otherwise, we will try
-    // to `Send` `mut state` into the spawned thread bellow, which will cause
-    // the following rustc error:
-    //
-    // error: future cannot be sent between threads safely
-    {
-        let mut state = compute.state.lock().unwrap();
-        if !matches!(state.status, ComputeStatus::Empty | ComputeStatus::Running) {
-            return JsonResponse::invalid_status(state.status);
-        }
-
-        state.pspec = Some(pspec);
-        state.set_status(ComputeStatus::ConfigurationPending, &compute.state_changed);
-        drop(state);
-    }
-
-    // Spawn a blocking thread to wait for compute to become Running. This is
-    // needed to do not block the main pool of workers and be able to serve
-    // other requests while some particular request is waiting for compute to
-    // finish configuration.
-    let c = compute.clone();
-    let completed = task::spawn_blocking(move || {
-        let mut state = c.state.lock().unwrap();
-        while state.status != ComputeStatus::Running {
-            state = c.state_changed.wait(state).unwrap();
-            info!(
-                "waiting for compute to become {}, current status: {}",
-                ComputeStatus::Running,
-                state.status
-            );
-
-            if state.status == ComputeStatus::Failed {
-                let err = state.error.as_ref().map_or("unknown error", |x| x);
-                let msg = format!("compute configuration failed: {:?}", err);
-                return Err(msg);
-            }
-        }
-
-        Ok(())
-    })
-    .await
-    .unwrap();
-
-    if let Err(e) = completed {
-        return JsonResponse::error(StatusCode::INTERNAL_SERVER_ERROR, e);
-    }
-
-    // Return current compute state if everything went well.
-    let state = compute.state.lock().unwrap().clone();
-    let body = ComputeStatusResponse::from(&state);
-
-    JsonResponse::success(StatusCode::OK, body)
-}
--- a/compute_tools/src/http/routes/database_schema.rs
+++ b/compute_tools/src/http/routes/database_schema.rs
@@ -1,34 +0,0 @@
-use std::sync::Arc;
-
-use axum::{body::Body, extract::State, response::Response};
-use http::{header::CONTENT_TYPE, StatusCode};
-use serde::Deserialize;
-
-use crate::{
-    catalog::{get_database_schema, SchemaDumpError},
-    compute::ComputeNode,
-    http::{extract::Query, JsonResponse},
-};
-
-#[derive(Debug, Clone, Deserialize)]
-pub(in crate::http) struct DatabaseSchemaParams {
-    database: String,
-}
-
-/// Get a schema dump of the requested database.
-pub(in crate::http) async fn get_schema_dump(
-    params: Query<DatabaseSchemaParams>,
-    State(compute): State<Arc<ComputeNode>>,
-) -> Response {
-    match get_database_schema(&compute, &params.database).await {
-        Ok(schema) => Response::builder()
-            .status(StatusCode::OK)
-            .header(CONTENT_TYPE.as_str(), "application/json")
-            .body(Body::from_stream(schema))
-            .unwrap(),
-        Err(SchemaDumpError::DatabaseDoesNotExist) => {
-            JsonResponse::error(StatusCode::NOT_FOUND, SchemaDumpError::DatabaseDoesNotExist)
-        }
-        Err(e) => JsonResponse::error(StatusCode::INTERNAL_SERVER_ERROR, e),
-    }
-}
--- a/compute_tools/src/http/routes/dbs_and_roles.rs
+++ b/compute_tools/src/http/routes/dbs_and_roles.rs
@@ -1,16 +0,0 @@
-use std::sync::Arc;
-
-use axum::{extract::State, response::Response};
-use http::StatusCode;
-
-use crate::{catalog::get_dbs_and_roles, compute::ComputeNode, http::JsonResponse};
-
-/// Get the databases and roles from the compute.
-pub(in crate::http) async fn get_catalog_objects(
-    State(compute): State<Arc<ComputeNode>>,
-) -> Response {
-    match get_dbs_and_roles(&compute).await {
-        Ok(catalog_objects) => JsonResponse::success(StatusCode::OK, catalog_objects),
-        Err(e) => JsonResponse::error(StatusCode::INTERNAL_SERVER_ERROR, e),
-    }
-}
--- a/compute_tools/src/http/routes/extension_server.rs
+++ b/compute_tools/src/http/routes/extension_server.rs
@@ -1,67 +0,0 @@
-use std::sync::Arc;
-
-use axum::{
-    extract::State,
-    response::{IntoResponse, Response},
-};
-use http::StatusCode;
-use serde::Deserialize;
-
-use crate::{
-    compute::ComputeNode,
-    http::{
-        extract::{Path, Query},
-        JsonResponse,
-    },
-};
-
-#[derive(Debug, Clone, Deserialize)]
-pub(in crate::http) struct ExtensionServerParams {
-    is_library: Option<bool>,
-}
-
-/// Download a remote extension.
-pub(in crate::http) async fn download_extension(
-    Path(filename): Path<String>,
-    params: Query<ExtensionServerParams>,
-    State(compute): State<Arc<ComputeNode>>,
-) -> Response {
-    // Don't even try to download extensions if no remote storage is configured
-    if compute.ext_remote_storage.is_none() {
-        return JsonResponse::error(
-            StatusCode::PRECONDITION_FAILED,
-            "remote storage is not configured",
-        );
-    }
-
-    let ext = {
-        let state = compute.state.lock().unwrap();
-        let pspec = state.pspec.as_ref().unwrap();
-        let spec = &pspec.spec;
-
-        let remote_extensions = match spec.remote_extensions.as_ref() {
-            Some(r) => r,
-            None => {
-                return JsonResponse::error(
-                    StatusCode::CONFLICT,
-                    "information about remote extensions is unavailable",
-                );
-            }
-        };
-
-        remote_extensions.get_ext(
-            &filename,
-            params.is_library.unwrap_or(false),
-            &compute.build_tag,
-            &compute.pgversion,
-        )
-    };
-
-    match ext {
-        Ok((ext_name, ext_path)) => match compute.download_extension(ext_name, ext_path).await {
-            Ok(_) => StatusCode::OK.into_response(),
-            Err(e) => JsonResponse::error(StatusCode::INTERNAL_SERVER_ERROR, e),
-        },
-        Err(e) => JsonResponse::error(StatusCode::NOT_FOUND, e),
-    }
-}
--- a/compute_tools/src/http/routes/extensions.rs
+++ b/compute_tools/src/http/routes/extensions.rs
@@ -1,45 +0,0 @@
-use std::sync::Arc;
-
-use axum::{extract::State, response::Response};
-use compute_api::{
-    requests::ExtensionInstallRequest,
-    responses::{ComputeStatus, ExtensionInstallResponse},
-};
-use http::StatusCode;
-
-use crate::{
-    compute::ComputeNode,
-    http::{extract::Json, JsonResponse},
-};
-
-/// Install a extension.
-pub(in crate::http) async fn install_extension(
-    State(compute): State<Arc<ComputeNode>>,
-    request: Json<ExtensionInstallRequest>,
-) -> Response {
-    let status = compute.get_status();
-    if status != ComputeStatus::Running {
-        return JsonResponse::invalid_status(status);
-    }
-
-    match compute
-        .install_extension(
-            &request.extension,
-            &request.database,
-            request.version.to_string(),
-        )
-        .await
-    {
-        Ok(version) => JsonResponse::success(
-            StatusCode::CREATED,
-            Some(ExtensionInstallResponse {
-                extension: request.extension.clone(),
-                version,
-            }),
-        ),
-        Err(e) => JsonResponse::error(
-            StatusCode::INTERNAL_SERVER_ERROR,
-            format!("failed to install extension: {e}"),
-        ),
-    }
-}
--- a/compute_tools/src/http/routes/failpoints.rs
+++ b/compute_tools/src/http/routes/failpoints.rs
@@ -1,35 +0,0 @@
-use axum::response::{IntoResponse, Response};
-use http::StatusCode;
-use tracing::info;
-use utils::failpoint_support::{apply_failpoint, ConfigureFailpointsRequest};
-
-use crate::http::{extract::Json, JsonResponse};
-
-/// Configure failpoints for testing purposes.
-pub(in crate::http) async fn configure_failpoints(
-    failpoints: Json<ConfigureFailpointsRequest>,
-) -> Response {
-    if !fail::has_failpoints() {
-        return JsonResponse::error(
-            StatusCode::PRECONDITION_FAILED,
-            "Cannot manage failpoints because neon was compiled without failpoints support",
-        );
-    }
-
-    for fp in &*failpoints {
-        info!("cfg failpoint: {} {}", fp.name, fp.actions);
-
-        // We recognize one extra "action" that's not natively recognized
-        // by the failpoints crate: exit, to immediately kill the process
-        let cfg_result = apply_failpoint(&fp.name, &fp.actions);
-
-        if let Err(e) = cfg_result {
-            return JsonResponse::error(
-                StatusCode::BAD_REQUEST,
-                format!("failed to configure failpoints: {e}"),
-            );
-        }
-    }
-
-    StatusCode::OK.into_response()
-}
--- a/compute_tools/src/http/routes/grants.rs
+++ b/compute_tools/src/http/routes/grants.rs
@@ -1,48 +0,0 @@
-use std::sync::Arc;
-
-use axum::{extract::State, response::Response};
-use compute_api::{
-    requests::SetRoleGrantsRequest,
-    responses::{ComputeStatus, SetRoleGrantsResponse},
-};
-use http::StatusCode;
-
-use crate::{
-    compute::ComputeNode,
-    http::{extract::Json, JsonResponse},
-};
-
-/// Add grants for a role.
-pub(in crate::http) async fn add_grant(
-    State(compute): State<Arc<ComputeNode>>,
-    request: Json<SetRoleGrantsRequest>,
-) -> Response {
-    let status = compute.get_status();
-    if status != ComputeStatus::Running {
-        return JsonResponse::invalid_status(status);
-    }
-
-    match compute
-        .set_role_grants(
-            &request.database,
-            &request.schema,
-            &request.privileges,
-            &request.role,
-        )
-        .await
-    {
-        Ok(()) => JsonResponse::success(
-            StatusCode::CREATED,
-            Some(SetRoleGrantsResponse {
-                database: request.database.clone(),
-                schema: request.schema.clone(),
-                role: request.role.clone(),
-                privileges: request.privileges.clone(),
-            }),
-        ),
-        Err(e) => JsonResponse::error(
-            StatusCode::INTERNAL_SERVER_ERROR,
-            format!("failed to grant role privileges to the schema: {e}"),
-        ),
-    }
-}
--- a/compute_tools/src/http/routes/info.rs
+++ b/compute_tools/src/http/routes/info.rs
@@ -1,11 +0,0 @@
-use axum::response::Response;
-use compute_api::responses::InfoResponse;
-use http::StatusCode;
-
-use crate::http::JsonResponse;
-
-/// Get information about the physical characteristics about the compute.
-pub(in crate::http) async fn get_info() -> Response {
-    let num_cpus = num_cpus::get_physical();
-    JsonResponse::success(StatusCode::OK, &InfoResponse { num_cpus })
-}
--- a/compute_tools/src/http/routes/insights.rs
+++ b/compute_tools/src/http/routes/insights.rs
@@ -1,18 +0,0 @@
-use std::sync::Arc;
-
-use axum::{extract::State, response::Response};
-use compute_api::responses::ComputeStatus;
-use http::StatusCode;
-
-use crate::{compute::ComputeNode, http::JsonResponse};
-
-/// Collect current Postgres usage insights.
-pub(in crate::http) async fn get_insights(State(compute): State<Arc<ComputeNode>>) -> Response {
-    let status = compute.get_status();
-    if status != ComputeStatus::Running {
-        return JsonResponse::invalid_status(status);
-    }
-
-    let insights = compute.collect_insights().await;
-    JsonResponse::success(StatusCode::OK, insights)
-}
--- a/compute_tools/src/http/routes/installed_extensions.rs
+++ b/compute_tools/src/http/routes/installed_extensions.rs
@@ -1,33 +0,0 @@
-use std::sync::Arc;
-
-use axum::{extract::State, response::Response};
-use compute_api::responses::ComputeStatus;
-use http::StatusCode;
-use tokio::task;
-
-use crate::{compute::ComputeNode, http::JsonResponse, installed_extensions};
-
-/// Get a list of installed extensions.
-pub(in crate::http) async fn get_installed_extensions(
-    State(compute): State<Arc<ComputeNode>>,
-) -> Response {
-    let status = compute.get_status();
-    if status != ComputeStatus::Running {
-        return JsonResponse::invalid_status(status);
-    }
-
-    let conf = compute.get_conn_conf(None);
-    let res = task::spawn_blocking(move || installed_extensions::get_installed_extensions(conf))
-        .await
-        .unwrap();
-
-    match res {
-        Ok(installed_extensions) => {
-            JsonResponse::success(StatusCode::OK, Some(installed_extensions))
-        }
-        Err(e) => JsonResponse::error(
-            StatusCode::INTERNAL_SERVER_ERROR,
-            format!("failed to get list of installed extensions: {e}"),
-        ),
-    }
-}
--- a/compute_tools/src/http/routes/metrics.rs
+++ b/compute_tools/src/http/routes/metrics.rs
@@ -1,32 +0,0 @@
-use axum::{body::Body, response::Response};
-use http::header::CONTENT_TYPE;
-use http::StatusCode;
-use metrics::proto::MetricFamily;
-use metrics::Encoder;
-use metrics::TextEncoder;
-
-use crate::{http::JsonResponse, installed_extensions};
-
-/// Expose Prometheus metrics.
-pub(in crate::http) async fn get_metrics() -> Response {
-    // When we call TextEncoder::encode() below, it will immediately return an
-    // error if a metric family has no metrics, so we need to preemptively
-    // filter out metric families with no metrics.
-    let metrics = installed_extensions::collect()
-        .into_iter()
-        .filter(|m| !m.get_metric().is_empty())
-        .collect::<Vec<MetricFamily>>();
-
-    let encoder = TextEncoder::new();
-    let mut buffer = vec![];
-
-    if let Err(e) = encoder.encode(&metrics, &mut buffer) {
-        return JsonResponse::error(StatusCode::INTERNAL_SERVER_ERROR, e);
-    }
-
-    Response::builder()
-        .status(StatusCode::OK)
-        .header(CONTENT_TYPE, encoder.format_type())
-        .body(Body::from(buffer))
-        .unwrap()
-}
--- a/compute_tools/src/http/routes/metrics_json.rs
+++ b/compute_tools/src/http/routes/metrics_json.rs
@@ -1,12 +0,0 @@
-use std::sync::Arc;
-
-use axum::{extract::State, response::Response};
-use http::StatusCode;
-
-use crate::{compute::ComputeNode, http::JsonResponse};
-
-/// Get startup metrics.
-pub(in crate::http) async fn get_metrics(State(compute): State<Arc<ComputeNode>>) -> Response {
-    let metrics = compute.state.lock().unwrap().metrics.clone();
-    JsonResponse::success(StatusCode::OK, metrics)
-}
--- a/compute_tools/src/http/routes/mod.rs
+++ b/compute_tools/src/http/routes/mod.rs
@@ -1,38 +0,0 @@
-use compute_api::responses::ComputeStatusResponse;
-
-use crate::compute::ComputeState;
-
-pub(in crate::http) mod check_writability;
-pub(in crate::http) mod configure;
-pub(in crate::http) mod database_schema;
-pub(in crate::http) mod dbs_and_roles;
-pub(in crate::http) mod extension_server;
-pub(in crate::http) mod extensions;
-pub(in crate::http) mod failpoints;
-pub(in crate::http) mod grants;
-pub(in crate::http) mod info;
-pub(in crate::http) mod insights;
-pub(in crate::http) mod installed_extensions;
-pub(in crate::http) mod metrics;
-pub(in crate::http) mod metrics_json;
-pub(in crate::http) mod status;
-pub(in crate::http) mod terminate;
-
-impl From<&ComputeState> for ComputeStatusResponse {
-    fn from(state: &ComputeState) -> Self {
-        ComputeStatusResponse {
-            start_time: state.start_time,
-            tenant: state
-                .pspec
-                .as_ref()
-                .map(|pspec| pspec.tenant_id.to_string()),
-            timeline: state
-                .pspec
-                .as_ref()
-                .map(|pspec| pspec.timeline_id.to_string()),
-            status: state.status,
-            last_active: state.last_active,
-            error: state.error.clone(),
-        }
-    }
-}
--- a/compute_tools/src/http/routes/status.rs
+++ b/compute_tools/src/http/routes/status.rs
@@ -1,14 +0,0 @@
-use std::{ops::Deref, sync::Arc};
-
-use axum::{extract::State, http::StatusCode, response::Response};
-use compute_api::responses::ComputeStatusResponse;
-
-use crate::{compute::ComputeNode, http::JsonResponse};
-
-/// Retrieve the state of the comute.
-pub(in crate::http) async fn get_status(State(compute): State<Arc<ComputeNode>>) -> Response {
-    let state = compute.state.lock().unwrap();
-    let body = ComputeStatusResponse::from(state.deref());
-
-    JsonResponse::success(StatusCode::OK, body)
-}
--- a/compute_tools/src/http/routes/terminate.rs
+++ b/compute_tools/src/http/routes/terminate.rs
@@ -1,58 +0,0 @@
-use std::sync::Arc;
-
-use axum::{
-    extract::State,
-    response::{IntoResponse, Response},
-};
-use compute_api::responses::ComputeStatus;
-use http::StatusCode;
-use tokio::task;
-use tracing::info;
-
-use crate::{
-    compute::{forward_termination_signal, ComputeNode},
-    http::JsonResponse,
-};
-
-/// Terminate the compute.
-pub(in crate::http) async fn terminate(State(compute): State<Arc<ComputeNode>>) -> Response {
-    {
-        let mut state = compute.state.lock().unwrap();
-        if state.status == ComputeStatus::Terminated {
-            return StatusCode::CREATED.into_response();
-        }
-
-        if !matches!(state.status, ComputeStatus::Empty | ComputeStatus::Running) {
-            return JsonResponse::invalid_status(state.status);
-        }
-
-        state.set_status(ComputeStatus::TerminationPending, &compute.state_changed);
-        drop(state);
-    }
-
-    forward_termination_signal();
-    info!("sent signal and notified waiters");
-
-    // Spawn a blocking thread to wait for compute to become Terminated.
-    // This is needed to do not block the main pool of workers and
-    // be able to serve other requests while some particular request
-    // is waiting for compute to finish configuration.
-    let c = compute.clone();
-    task::spawn_blocking(move || {
-        let mut state = c.state.lock().unwrap();
-        while state.status != ComputeStatus::Terminated {
-            state = c.state_changed.wait(state).unwrap();
-            info!(
-                "waiting for compute to become {}, current status: {:?}",
-                ComputeStatus::Terminated,
-                state.status
-            );
-        }
-    })
-    .await
-    .unwrap();
-
-    info!("terminated Postgres");
-
-    StatusCode::OK.into_response()
-}
--- a/compute_tools/src/http/server.rs
+++ b/compute_tools/src/http/server.rs
@@ -1,165 +0,0 @@
-use std::{
-    net::{IpAddr, Ipv6Addr, SocketAddr},
-    sync::{
-        atomic::{AtomicU64, Ordering},
-        Arc,
-    },
-    thread,
-    time::Duration,
-};
-
-use anyhow::Result;
-use axum::{
-    response::{IntoResponse, Response},
-    routing::{get, post},
-    Router,
-};
-use http::StatusCode;
-use tokio::net::TcpListener;
-use tower::ServiceBuilder;
-use tower_http::{
-    request_id::{MakeRequestId, PropagateRequestIdLayer, RequestId, SetRequestIdLayer},
-    trace::TraceLayer,
-};
-use tracing::{debug, error, info, Span};
-
-use super::routes::{
-    check_writability, configure, database_schema, dbs_and_roles, extension_server, extensions,
-    grants, info as info_route, insights, installed_extensions, metrics, metrics_json, status,
-    terminate,
-};
-use crate::compute::ComputeNode;
-
-async fn handle_404() -> Response {
-    StatusCode::NOT_FOUND.into_response()
-}
-
-#[derive(Clone, Default)]
-struct ComputeMakeRequestId(Arc<AtomicU64>);
-
-impl MakeRequestId for ComputeMakeRequestId {
-    fn make_request_id<B>(
-        &mut self,
-        _request: &http::Request<B>,
-    ) -> Option<tower_http::request_id::RequestId> {
-        let request_id = self
-            .0
-            .fetch_add(1, Ordering::SeqCst)
-            .to_string()
-            .parse()
-            .unwrap();
-
-        Some(RequestId::new(request_id))
-    }
-}
-
-/// Run the HTTP server and wait on it forever.
-#[tokio::main]
-async fn serve(port: u16, compute: Arc<ComputeNode>) {
-    const X_REQUEST_ID: &str = "x-request-id";
-
-    let mut app = Router::new()
-        .route("/check_writability", post(check_writability::is_writable))
-        .route("/configure", post(configure::configure))
-        .route("/database_schema", get(database_schema::get_schema_dump))
-        .route("/dbs_and_roles", get(dbs_and_roles::get_catalog_objects))
-        .route(
-            "/extension_server/*filename",
-            post(extension_server::download_extension),
-        )
-        .route("/extensions", post(extensions::install_extension))
-        .route("/grants", post(grants::add_grant))
-        .route("/info", get(info_route::get_info))
-        .route("/insights", get(insights::get_insights))
-        .route(
-            "/installed_extensions",
-            get(installed_extensions::get_installed_extensions),
-        )
-        .route("/metrics", get(metrics::get_metrics))
-        .route("/metrics.json", get(metrics_json::get_metrics))
-        .route("/status", get(status::get_status))
-        .route("/terminate", post(terminate::terminate))
-        .fallback(handle_404)
-        .layer(
-            ServiceBuilder::new()
-                .layer(SetRequestIdLayer::x_request_id(
-                    ComputeMakeRequestId::default(),
-                ))
-                .layer(
-                    TraceLayer::new_for_http()
-                        .on_request(|request: &http::Request<_>, _span: &Span| {
-                            let request_id = request
-                                .headers()
-                                .get(X_REQUEST_ID)
-                                .unwrap()
-                                .to_str()
-                                .unwrap();
-
-                            match request.uri().path() {
-                                "/metrics" => {
-                                    debug!(%request_id, "{} {}", request.method(), request.uri())
-                                }
-                                _ => info!(%request_id, "{} {}", request.method(), request.uri()),
-                            };
-                        })
-                        .on_response(
-                            |response: &http::Response<_>, latency: Duration, _span: &Span| {
-                                let request_id = response
-                                    .headers()
-                                    .get(X_REQUEST_ID)
-                                    .unwrap()
-                                    .to_str()
-                                    .unwrap();
-
-                                info!(
-                                    %request_id,
-                                    code = response.status().as_u16(),
-                                    latency = latency.as_millis()
-                                )
-                            },
-                        ),
-                )
-                .layer(PropagateRequestIdLayer::x_request_id()),
-        )
-        .with_state(compute);
-
-    // Add in any testing support
-    if cfg!(feature = "testing") {
-        use super::routes::failpoints;
-
-        app = app.route("/failpoints", post(failpoints::configure_failpoints))
-    }
-
-    // This usually binds to both IPv4 and IPv6 on Linux, see
-    // https://github.com/rust-lang/rust/pull/34440 for more information
-    let addr = SocketAddr::new(IpAddr::from(Ipv6Addr::UNSPECIFIED), port);
-    let listener = match TcpListener::bind(&addr).await {
-        Ok(listener) => listener,
-        Err(e) => {
-            error!(
-                "failed to bind the compute_ctl HTTP server to port {}: {}",
-                port, e
-            );
-            return;
-        }
-    };
-
-    if let Ok(local_addr) = listener.local_addr() {
-        info!("compute_ctl HTTP server listening on {}", local_addr);
-    } else {
-        info!("compute_ctl HTTP server listening on port {}", port);
-    }
-
-    if let Err(e) = axum::serve(listener, app).await {
-        error!("compute_ctl HTTP server error: {}", e);
-    }
-}
-
-/// Launch a separate HTTP server thread and return its `JoinHandle`.
-pub fn launch_http_server(port: u16, state: &Arc<ComputeNode>) -> Result<thread::JoinHandle<()>> {
-    let state = Arc::clone(state);
-
-    Ok(thread::Builder::new()
-        .name("http-server".into())
-        .spawn(move || serve(port, state))?)
-}
--- a/compute_tools/src/lib.rs
+++ b/compute_tools/src/lib.rs
@@ -3,6 +3,8 @@
 #![deny(unsafe_code)]
 #![deny(clippy::undocumented_unsafe_blocks)]

+extern crate hyper0 as hyper;
+
 pub mod checker;
 pub mod config;
 pub mod configurator;
--- a/compute_tools/src/migration.rs
+++ b/compute_tools/src/migration.rs
@@ -1,16 +1,13 @@
 use anyhow::{Context, Result};
-use fail::fail_point;
-use postgres::{Client, Transaction};
+use postgres::Client;
 use tracing::info;

-/// Runs a series of migrations on a target database
 pub(crate) struct MigrationRunner<'m> {
    client: &'m mut Client,
    migrations: &'m [&'m str],
 }

 impl<'m> MigrationRunner<'m> {
-    /// Create a new migration runner
    pub fn new(client: &'m mut Client, migrations: &'m [&'m str]) -> Self {
        // The neon_migration.migration_id::id column is a bigint, which is equivalent to an i64
        assert!(migrations.len() + 1 < i64::MAX as usize);
@@ -18,110 +15,87 @@ impl<'m> MigrationRunner<'m> {
        Self { client, migrations }
    }

-    /// Get the current value neon_migration.migration_id
    fn get_migration_id(&mut self) -> Result<i64> {
+        let query = "SELECT id FROM neon_migration.migration_id";
        let row = self
            .client
-            .query_one("SELECT id FROM neon_migration.migration_id", &[])?;
+            .query_one(query, &[])
+            .context("run_migrations get migration_id")?;

        Ok(row.get::<&str, i64>("id"))
    }

-    /// Update the neon_migration.migration_id value
-    ///
-    /// This function has a fail point called compute-migration, which can be
-    /// used if you would like to fail the application of a series of migrations
-    /// at some point.
-    fn update_migration_id(txn: &mut Transaction, migration_id: i64) -> Result<()> {
-        // We use this fail point in order to check that failing in the
-        // middle of applying a series of migrations fails in an expected
-        // manner
-        if cfg!(feature = "testing") {
-            let fail = (|| {
-                fail_point!("compute-migration", |fail_migration_id| {
-                    migration_id == fail_migration_id.unwrap().parse::<i64>().unwrap()
-                });
+    fn update_migration_id(&mut self, migration_id: i64) -> Result<()> {
+        let setval = format!("UPDATE neon_migration.migration_id SET id={}", migration_id);

-                false
-            })();
-
-            if fail {
-                return Err(anyhow::anyhow!(format!(
-                    "migration {} was configured to fail because of a failpoint",
-                    migration_id
-                )));
-            }
-        }
-
-        txn.query(
-            "UPDATE neon_migration.migration_id SET id = $1",
-            &[&migration_id],
-        )
-        .with_context(|| format!("update neon_migration.migration_id to {migration_id}"))?;
+        self.client
+            .simple_query(&setval)
+            .context("run_migrations update id")?;

        Ok(())
    }

-    /// Prepare the migrations the target database for handling migrations
-    fn prepare_database(&mut self) -> Result<()> {
-        self.client
-            .simple_query("CREATE SCHEMA IF NOT EXISTS neon_migration")?;
-        self.client.simple_query("CREATE TABLE IF NOT EXISTS neon_migration.migration_id (key INT NOT NULL PRIMARY KEY, id bigint NOT NULL DEFAULT 0)")?;
-        self.client.simple_query(
-            "INSERT INTO neon_migration.migration_id VALUES (0, 0) ON CONFLICT DO NOTHING",
-        )?;
-        self.client
-            .simple_query("ALTER SCHEMA neon_migration OWNER TO cloud_admin")?;
-        self.client
-            .simple_query("REVOKE ALL ON SCHEMA neon_migration FROM PUBLIC")?;
+    fn prepare_migrations(&mut self) -> Result<()> {
+        let query = "CREATE SCHEMA IF NOT EXISTS neon_migration";
+        self.client.simple_query(query)?;
+
+        let query = "CREATE TABLE IF NOT EXISTS neon_migration.migration_id (key INT NOT NULL PRIMARY KEY, id bigint NOT NULL DEFAULT 0)";
+        self.client.simple_query(query)?;
+
+        let query = "INSERT INTO neon_migration.migration_id VALUES (0, 0) ON CONFLICT DO NOTHING";
+        self.client.simple_query(query)?;
+
+        let query = "ALTER SCHEMA neon_migration OWNER TO cloud_admin";
+        self.client.simple_query(query)?;
+
+        let query = "REVOKE ALL ON SCHEMA neon_migration FROM PUBLIC";
+        self.client.simple_query(query)?;

        Ok(())
    }

-    /// Run an individual migration
-    fn run_migration(txn: &mut Transaction, migration_id: i64, migration: &str) -> Result<()> {
-        if migration.starts_with("-- SKIP") {
-            info!("Skipping migration id={}", migration_id);
-
-            // Even though we are skipping the migration, updating the
-            // migration ID should help keep logic easy to understand when
-            // trying to understand the state of a cluster.
-            Self::update_migration_id(txn, migration_id)?;
-        } else {
-            info!("Running migration id={}:\n{}\n", migration_id, migration);
-
-            txn.simple_query(migration)
-                .with_context(|| format!("apply migration {migration_id}"))?;
-
-            Self::update_migration_id(txn, migration_id)?;
-        }
-
-        Ok(())
-    }
-
-    /// Run the configured set of migrations
    pub fn run_migrations(mut self) -> Result<()> {
-        self.prepare_database()
-            .context("prepare database to handle migrations")?;
+        self.prepare_migrations()?;

        let mut current_migration = self.get_migration_id()? as usize;
        while current_migration < self.migrations.len() {
-            // The index lags the migration ID by 1, so the current migration
-            // ID is also the next index
-            let migration_id = (current_migration + 1) as i64;
+            macro_rules! migration_id {
+                ($cm:expr) => {
+                    ($cm + 1) as i64
+                };
+            }

-            let mut txn = self
-                .client
-                .transaction()
-                .with_context(|| format!("begin transaction for migration {migration_id}"))?;
+            let migration = self.migrations[current_migration];

-            Self::run_migration(&mut txn, migration_id, self.migrations[current_migration])
-                .with_context(|| format!("running migration {migration_id}"))?;
+            if migration.starts_with("-- SKIP") {
+                info!("Skipping migration id={}", migration_id!(current_migration));
+            } else {
+                info!(
+                    "Running migration id={}:\n{}\n",
+                    migration_id!(current_migration),
+                    migration
+                );

-            txn.commit()
-                .with_context(|| format!("commit transaction for migration {migration_id}"))?;
+                self.client
+                    .simple_query("BEGIN")
+                    .context("begin migration")?;

-            info!("Finished migration id={}", migration_id);
+                self.client.simple_query(migration).with_context(|| {
+                    format!(
+                        "run_migrations migration id={}",
+                        migration_id!(current_migration)
+                    )
+                })?;
+
+                // Migration IDs start at 1
+                self.update_migration_id(migration_id!(current_migration))?;
+
+                self.client
+                    .simple_query("COMMIT")
+                    .context("commit migration")?;
+
+                info!("Finished migration id={}", migration_id!(current_migration));
+            }

            current_migration += 1;
        }
--- a/compute_tools/src/migrations/tests/0001-neon_superuser_bypass_rls.sql
+++ b/compute_tools/src/migrations/tests/0001-neon_superuser_bypass_rls.sql
@@ -1,9 +0,0 @@
-DO $$
-DECLARE
-    bypassrls boolean;
-BEGIN
-    SELECT rolbypassrls INTO bypassrls FROM pg_roles WHERE rolname = 'neon_superuser';
-    IF NOT bypassrls THEN
-        RAISE EXCEPTION 'neon_superuser cannot bypass RLS';
-    END IF;
-END $$;
--- a/compute_tools/src/migrations/tests/0002-alter_roles.sql
+++ b/compute_tools/src/migrations/tests/0002-alter_roles.sql
@@ -1,25 +0,0 @@
-DO $$
-DECLARE
-    role record;
-BEGIN
-    FOR role IN
-        SELECT rolname AS name, rolinherit AS inherit
-        FROM pg_roles
-        WHERE pg_has_role(rolname, 'neon_superuser', 'member')
-    LOOP
-        IF NOT role.inherit THEN
-            RAISE EXCEPTION '% cannot inherit', quote_ident(role.name);
-        END IF;
-    END LOOP;
-
-    FOR role IN
-        SELECT rolname AS name, rolbypassrls AS bypassrls
-        FROM pg_roles
-        WHERE NOT pg_has_role(rolname, 'neon_superuser', 'member')
-            AND NOT starts_with(rolname, 'pg_')
-    LOOP
-        IF role.bypassrls THEN
-            RAISE EXCEPTION  '% can bypass RLS', quote_ident(role.name);
-        END IF;
-    END LOOP;
-END $$;
--- a/compute_tools/src/migrations/tests/0003-grant_pg_create_subscription_to_neon_superuser.sql
+++ b/compute_tools/src/migrations/tests/0003-grant_pg_create_subscription_to_neon_superuser.sql
@@ -1,10 +0,0 @@
-DO $$
-BEGIN
-    IF (SELECT current_setting('server_version_num')::numeric < 160000) THEN
-        RETURN;
-    END IF;
-
-    IF NOT (SELECT pg_has_role('neon_superuser', 'pg_create_subscription', 'member')) THEN
-        RAISE EXCEPTION 'neon_superuser cannot execute pg_create_subscription';
-    END IF;
-END $$;
--- a/compute_tools/src/migrations/tests/0004-grant_pg_monitor_to_neon_superuser.sql
+++ b/compute_tools/src/migrations/tests/0004-grant_pg_monitor_to_neon_superuser.sql
@@ -1,19 +0,0 @@
-DO $$
-DECLARE
-    monitor record;
-BEGIN
-    SELECT pg_has_role('neon_superuser', 'pg_monitor', 'member') AS member,
-            admin_option AS admin
-        INTO monitor
-        FROM pg_auth_members
-        WHERE roleid = 'pg_monitor'::regrole
-            AND member = 'pg_monitor'::regrole;
-
-    IF NOT monitor.member THEN
-        RAISE EXCEPTION 'neon_superuser is not a member of pg_monitor';
-    END IF;
-
-    IF NOT monitor.admin THEN
-        RAISE EXCEPTION 'neon_superuser cannot grant pg_monitor';
-    END IF;
-END $$;
--- a/compute_tools/src/migrations/tests/0005-grant_all_on_tables_to_neon_superuser.sql
+++ b/compute_tools/src/migrations/tests/0005-grant_all_on_tables_to_neon_superuser.sql
@@ -1,2 +0,0 @@
-- This test was never written becuase at the time migration tests were added
-- the accompanying migration was already skipped.
--- a/compute_tools/src/migrations/tests/0006-grant_all_on_sequences_to_neon_superuser.sql
+++ b/compute_tools/src/migrations/tests/0006-grant_all_on_sequences_to_neon_superuser.sql
@@ -1,2 +0,0 @@
-- This test was never written becuase at the time migration tests were added
-- the accompanying migration was already skipped.
--- a/compute_tools/src/migrations/tests/0007-grant_all_on_tables_to_neon_superuser_with_grant_option.sql
+++ b/compute_tools/src/migrations/tests/0007-grant_all_on_tables_to_neon_superuser_with_grant_option.sql
@@ -1,2 +0,0 @@
-- This test was never written becuase at the time migration tests were added
-- the accompanying migration was already skipped.
--- a/compute_tools/src/migrations/tests/0008-grant_all_on_sequences_to_neon_superuser_with_grant_option.sql
+++ b/compute_tools/src/migrations/tests/0008-grant_all_on_sequences_to_neon_superuser_with_grant_option.sql
@@ -1,2 +0,0 @@
-- This test was never written becuase at the time migration tests were added
-- the accompanying migration was already skipped.
--- a/compute_tools/src/migrations/tests/0009-revoke_replication_for_previously_allowed_roles.sql
+++ b/compute_tools/src/migrations/tests/0009-revoke_replication_for_previously_allowed_roles.sql
@@ -1,2 +0,0 @@
-- This test was never written becuase at the time migration tests were added
-- the accompanying migration was already skipped.
--- a/compute_tools/src/migrations/tests/0010-grant_snapshot_synchronization_funcs_to_neon_superuser.sql
+++ b/compute_tools/src/migrations/tests/0010-grant_snapshot_synchronization_funcs_to_neon_superuser.sql
@@ -1,13 +0,0 @@
-DO $$
-DECLARE
-    can_execute boolean;
-BEGIN
-    SELECT bool_and(has_function_privilege('neon_superuser', oid, 'execute'))
-       INTO can_execute
-       FROM pg_proc
-       WHERE proname IN ('pg_export_snapshot', 'pg_log_standby_snapshot')
-           AND pronamespace = 'pg_catalog'::regnamespace;
-    IF NOT can_execute THEN
-        RAISE EXCEPTION 'neon_superuser cannot execute both pg_export_snapshot and pg_log_standby_snapshot';
-    END IF;
-END $$;
--- a/compute_tools/src/migrations/tests/0011-grant_pg_show_replication_origin_status_to_neon_superuser.sql
+++ b/compute_tools/src/migrations/tests/0011-grant_pg_show_replication_origin_status_to_neon_superuser.sql
@@ -1,13 +0,0 @@
-DO $$
-DECLARE
-    can_execute boolean;
-BEGIN
-    SELECT has_function_privilege('neon_superuser', oid, 'execute')
-       INTO can_execute
-       FROM pg_proc
-       WHERE proname = 'pg_show_replication_origin_status'
-           AND pronamespace = 'pg_catalog'::regnamespace;
-    IF NOT can_execute THEN
-        RAISE EXCEPTION 'neon_superuser cannot execute pg_show_replication_origin_status';
-    END IF;
-END $$;
--- a/compute_tools/src/spec_apply.rs
+++ b/compute_tools/src/spec_apply.rs
@@ -47,7 +47,6 @@ pub enum PerDatabasePhase {
    DeleteDBRoleReferences,
    ChangeSchemaPerms,
    HandleAnonExtension,
-    DropSubscriptionsForDeletedDatabases,
 }

 #[derive(Clone, Debug)]
@@ -75,7 +74,7 @@ pub struct MutableApplyContext {
    pub dbs: HashMap<String, Database>,
 }

-/// Apply the operations that belong to the given spec apply phase.
+/// Appply the operations that belong to the given spec apply phase.
 ///
 /// Commands within a single phase are executed in order of Iterator yield.
 /// Commands of ApplySpecPhase::RunInEachDatabase will execute in the database
@@ -327,12 +326,13 @@ async fn get_operations<'a>(

                            // Use FORCE to drop database even if there are active connections.
                            // We run this from `cloud_admin`, so it should have enough privileges.
-                            //
                            // NB: there could be other db states, which prevent us from dropping
                            // the database. For example, if db is used by any active subscription
                            // or replication slot.
-                            // Such cases are handled in the DropSubscriptionsForDeletedDatabases
-                            // phase. We do all the cleanup before actually dropping the database.
+                            // TODO: deal with it once we allow logical replication. Proper fix should
+                            // involve returning an error code to the control plane, so it could
+                            // figure out that this is a non-retryable error, return it to the user
+                            // and fail operation permanently.
                            let drop_db_query: String = format!(
                                "DROP DATABASE IF EXISTS {} WITH (FORCE)",
                                &op.name.pg_quote()
@@ -444,30 +444,6 @@ async fn get_operations<'a>(
        }
        ApplySpecPhase::RunInEachDatabase { db, subphase } => {
            match subphase {
-                PerDatabasePhase::DropSubscriptionsForDeletedDatabases => {
-                    match &db {
-                        DB::UserDB(db) => {
-                            let drop_subscription_query: String = format!(
-                                include_str!("sql/drop_subscription_for_drop_dbs.sql"),
-                                datname_str = escape_literal(&db.name),
-                            );
-
-                            let operations = vec![Operation {
-                                query: drop_subscription_query,
-                                comment: Some(format!(
-                                    "optionally dropping subscriptions for DB {}",
-                                    db.name,
-                                )),
-                            }]
-                            .into_iter();
-
-                            Ok(Box::new(operations))
-                        }
-                        // skip this cleanup for the system databases
-                        // because users can't drop them
-                        DB::SystemDB => Ok(Box::new(empty())),
-                    }
-                }
                PerDatabasePhase::DeleteDBRoleReferences => {
                    let ctx = ctx.read().await;

@@ -498,19 +474,7 @@ async fn get_operations<'a>(
                                        ),
                                        comment: None,
                                    },
-                                    // Revoke some potentially blocking privileges (Neon-specific currently)
-                                    Operation {
-                                        query: format!(
-                                            include_str!("sql/pre_drop_role_revoke_privileges.sql"),
-                                            role_name = quoted,
-                                        ),
-                                        comment: None,
-                                    },
                                    // This now will only drop privileges of the role
-                                    // TODO: this is obviously not 100% true because of the above case,
-                                    // there could be still some privileges that are not revoked. Maybe this
-                                    // only drops privileges that were granted *by this* role, not *to this* role,
-                                    // but this has to be checked.
                                    Operation {
                                        query: format!("DROP OWNED BY {}", quoted),
                                        comment: None,
--- a/compute_tools/src/sql/drop_subscription_for_drop_dbs.sql
+++ b/compute_tools/src/sql/drop_subscription_for_drop_dbs.sql
@@ -1,11 +0,0 @@
-DO $$
-DECLARE
-    subname TEXT;
-BEGIN
-    FOR subname IN SELECT pg_subscription.subname FROM pg_subscription WHERE subdbid = (SELECT oid FROM pg_database WHERE datname = {datname_str}) LOOP
-        EXECUTE format('ALTER SUBSCRIPTION %I DISABLE;', subname);
-        EXECUTE format('ALTER SUBSCRIPTION %I SET (slot_name = NONE);', subname);
-        EXECUTE format('DROP SUBSCRIPTION %I;', subname);
-    END LOOP;
-END;
-$$;
--- a/compute_tools/src/sql/pre_drop_role_revoke_privileges.sql
+++ b/compute_tools/src/sql/pre_drop_role_revoke_privileges.sql
@@ -1,28 +0,0 @@
-SET SESSION ROLE neon_superuser;
-
-DO $$
-DECLARE
-    schema TEXT;
-    revoke_query TEXT;
-BEGIN
-    FOR schema IN
-        SELECT schema_name
-        FROM information_schema.schemata
-        -- So far, we only had issues with 'public' schema. Probably, because we do some additional grants,
-        -- e.g., make DB owner the owner of 'public' schema automatically (when created via API).
-        -- See https://github.com/neondatabase/cloud/issues/13582 for the context.
-        -- Still, keep the loop because i) it efficiently handles the case when there is no 'public' schema,
-        -- ii) it's easy to add more schemas to the list if needed.
-        WHERE schema_name IN ('public')
-    LOOP
-        revoke_query := format(
-            'REVOKE ALL PRIVILEGES ON ALL TABLES IN SCHEMA %I FROM {role_name} GRANTED BY neon_superuser;',
-            schema
-        );
-
-        EXECUTE revoke_query;
-    END LOOP;
-END;
-$$;
-
-RESET ROLE;
--- a/control_plane/src/endpoint.rs
+++ b/control_plane/src/endpoint.rs
@@ -62,7 +62,7 @@ use crate::local_env::LocalEnv;
 use crate::postgresql_conf::PostgresConf;
 use crate::storage_controller::StorageController;

-use compute_api::responses::{ComputeStatus, ComputeStatusResponse};
+use compute_api::responses::{ComputeState, ComputeStatus};
 use compute_api::spec::{Cluster, ComputeFeature, ComputeMode, ComputeSpec};

 // contents of a endpoint.json file
@@ -585,7 +585,6 @@ impl Endpoint {
            features: self.features.clone(),
            swap_size_bytes: None,
            disk_quota_bytes: None,
-            disable_lfc_resizing: None,
            cluster: Cluster {
                cluster_id: None, // project ID: not used
                name: None,       // project name: not used
@@ -739,7 +738,7 @@ impl Endpoint {
    }

    // Call the /status HTTP API
-    pub async fn get_status(&self) -> Result<ComputeStatusResponse> {
+    pub async fn get_status(&self) -> Result<ComputeState> {
        let client = reqwest::Client::new();

        let response = client
--- a/control_plane/storcon_cli/src/main.rs
+++ b/control_plane/storcon_cli/src/main.rs
@@ -1035,15 +1035,7 @@ async fn main() -> anyhow::Result<()> {
            resp.sort_by(|a, b| a.id.cmp(&b.id));

            let mut table = comfy_table::Table::new();
-            table.set_header([
-                "Id",
-                "Version",
-                "Host",
-                "Port",
-                "Http Port",
-                "AZ Id",
-                "Scheduling",
-            ]);
+            table.set_header(["Id", "Version", "Host", "Port", "Http Port", "AZ Id"]);
            for sk in resp {
                table.add_row([
                    format!("{}", sk.id),
@@ -1051,8 +1043,7 @@ async fn main() -> anyhow::Result<()> {
                    sk.host,
                    format!("{}", sk.port),
                    format!("{}", sk.http_port),
-                    sk.availability_zone_id.clone(),
-                    String::from(sk.scheduling_policy),
+                    sk.availability_zone_id.to_string(),
                ]);
            }
            println!("{table}");
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -0,0 +1,96 @@
+version: '3.8'
+
+x-build-args-bullseye: &build-args-bullseye
+  DEBIAN_VERSION: bullseye
+  GIT_VERSION: local # seems to be not used in compute node though
+  BUILD_TAG: ${BUILD_TAG:-local}
+
+x-build-args-bookworm: &build-args-bookworm
+  DEBIAN_VERSION: bookworm
+  GIT_VERSION: local # seems to be not used in compute node though
+  BUILD_TAG: ${BUILD_TAG:-local}
+
+services:
+  compute-node-v14: &compute-node-v14-base
+    image: neondatabase/compute-node-v14:${IMAGE_TAG:-local}
+    build:
+      context: .
+      dockerfile: compute/compute-node.Dockerfile
+      args:
+        <<: *build-args-bullseye
+        PG_VERSION: v14
+      cache_from:
+        - neondatabase/compute-node-v14:${CACHE_FROM_TAG:-latest}
+
+  compute-node-v14-amd64:
+    <<: *compute-node-v14-base
+    platform: linux/amd64
+    image: neondatabase/compute-node-v14:${IMAGE_TAG:-local}-amd64
+
+  compute-node-v14-arm64:
+    <<: *compute-node-v14-base
+    platform: linux/arm64
+    image: neondatabase/compute-node-v14:${IMAGE_TAG:-local}-arm64
+
+  compute-node-v15: &compute-node-v15-base
+    image: neondatabase/compute-node-v15:${IMAGE_TAG:-local}
+    build:
+      context: .
+      dockerfile: compute/compute-node.Dockerfile
+      args:
+        <<: *build-args-bullseye
+        PG_VERSION: v15
+      cache_from:
+        - neondatabase/compute-node-v15:${CACHE_FROM_TAG:-latest}
+
+  compute-node-v15-amd64:
+    <<: *compute-node-v15-base
+    platform: linux/amd64
+    image: neondatabase/compute-node-v15:${IMAGE_TAG:-local}-amd64
+
+  compute-node-v15-arm64:
+    <<: *compute-node-v15-base
+    platform: linux/arm64
+    image: neondatabase/compute-node-v15:${IMAGE_TAG:-local}-arm64
+
+  compute-node-v16: &compute-node-v16-base
+    image: neondatabase/compute-node-v16:${IMAGE_TAG:-local}
+    build:
+      context: .
+      dockerfile: compute/compute-node.Dockerfile
+      args:
+        <<: *build-args-bullseye
+        PG_VERSION: v16
+      cache_from:
+        - neondatabase/compute-node-v16:${CACHE_FROM_TAG:-latest}
+
+  compute-node-v16-amd64:
+    <<: *compute-node-v16-base
+    platform: linux/amd64
+    image: neondatabase/compute-node-v16:${IMAGE_TAG:-local}-amd64
+
+  compute-node-v16-arm64:
+    <<: *compute-node-v16-base
+    platform: linux/arm64
+    image: neondatabase/compute-node-v16:${IMAGE_TAG:-local}-arm64
+
+  compute-node-v17: &compute-node-v17-base
+    image: neondatabase/compute-node-v17:${IMAGE_TAG:-local}
+    build:
+      context: .
+      dockerfile: compute/compute-node.Dockerfile
+      args:
+        <<: *build-args-bookworm
+        PG_VERSION: v17
+      cache_from:
+        - neondatabase/compute-node-v17:${CACHE_FROM_TAG:-latest}
+
+  compute-node-v17-amd64:
+    <<: *compute-node-v17-base
+    platform: linux/amd64
+    image: neondatabase/compute-node-v17:${IMAGE_TAG:-local}-amd64
+
+  compute-node-v17-arm64:
+    <<: *compute-node-v17-base
+    platform: linux/arm64
+    image: neondatabase/compute-node-v17:${IMAGE_TAG:-local}-arm64
--- a/libs/compute_api/src/responses.rs
+++ b/libs/compute_api/src/responses.rs
@@ -15,17 +15,6 @@ pub struct GenericAPIError {
    pub error: String,
 }

-#[derive(Debug, Clone, Serialize)]
-pub struct InfoResponse {
-    pub num_cpus: usize,
-}
-
-#[derive(Debug, Clone, Serialize)]
-pub struct ExtensionInstallResponse {
-    pub extension: PgIdent,
-    pub version: ExtVersion,
-}
-
 /// Response of the /status API
 #[derive(Serialize, Debug, Deserialize)]
 #[serde(rename_all = "snake_case")]
@@ -39,6 +28,16 @@ pub struct ComputeStatusResponse {
    pub error: Option<String>,
 }

+#[derive(Deserialize, Serialize)]
+#[serde(rename_all = "snake_case")]
+pub struct ComputeState {
+    pub status: ComputeStatus,
+    /// Timestamp of the last Postgres activity
+    #[serde(serialize_with = "rfc3339_serialize")]
+    pub last_active: Option<DateTime<Utc>>,
+    pub error: Option<String>,
+}
+
 #[derive(Serialize, Clone, Copy, Debug, Deserialize, PartialEq, Eq)]
 #[serde(rename_all = "snake_case")]
 pub enum ComputeStatus {
@@ -79,7 +78,7 @@ impl Display for ComputeStatus {
    }
 }

-pub fn rfc3339_serialize<S>(x: &Option<DateTime<Utc>>, s: S) -> Result<S::Ok, S::Error>
+fn rfc3339_serialize<S>(x: &Option<DateTime<Utc>>, s: S) -> Result<S::Ok, S::Error>
 where
    S: Serializer,
 {
--- a/libs/compute_api/src/spec.rs
+++ b/libs/compute_api/src/spec.rs
@@ -67,15 +67,6 @@ pub struct ComputeSpec {
    #[serde(default)]
    pub disk_quota_bytes: Option<u64>,

-    /// Disables the vm-monitor behavior that resizes LFC on upscale/downscale, instead relying on
-    /// the initial size of LFC.
-    ///
-    /// This is intended for use when the LFC size is being overridden from the default but
-    /// autoscaling is still enabled, and we don't want the vm-monitor to interfere with the custom
-    /// LFC sizing.
-    #[serde(default)]
-    pub disable_lfc_resizing: Option<bool>,
-
    /// Expected cluster state at the end of transition process.
    pub cluster: Cluster,
    pub delta_operations: Option<Vec<DeltaOp>>,
--- a/libs/pageserver_api/src/controller_api.rs
+++ b/libs/pageserver_api/src/controller_api.rs
@@ -320,38 +320,6 @@ impl From<NodeSchedulingPolicy> for String {
    }
 }

-#[derive(Serialize, Deserialize, Clone, Copy, Eq, PartialEq, Debug)]
-pub enum SkSchedulingPolicy {
-    Active,
-    Disabled,
-    Decomissioned,
-}
-
-impl FromStr for SkSchedulingPolicy {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        Ok(match s {
-            "active" => Self::Active,
-            "disabled" => Self::Disabled,
-            "decomissioned" => Self::Decomissioned,
-            _ => return Err(anyhow::anyhow!("Unknown scheduling state '{s}'")),
-        })
-    }
-}
-
-impl From<SkSchedulingPolicy> for String {
-    fn from(value: SkSchedulingPolicy) -> String {
-        use SkSchedulingPolicy::*;
-        match value {
-            Active => "active",
-            Disabled => "disabled",
-            Decomissioned => "decomissioned",
-        }
-        .to_string()
-    }
-}
-
 /// Controls how tenant shards are mapped to locations on pageservers, e.g. whether
 /// to create secondary locations.
 #[derive(Clone, Serialize, Deserialize, Debug, PartialEq, Eq)]
@@ -419,7 +387,6 @@ pub struct SafekeeperDescribeResponse {
    pub port: i32,
    pub http_port: i32,
    pub availability_zone_id: String,
-    pub scheduling_policy: SkSchedulingPolicy,
 }

 #[cfg(test)]
--- a/libs/pageserver_api/src/models.rs
+++ b/libs/pageserver_api/src/models.rs
@@ -1460,91 +1460,75 @@ impl TryFrom<u8> for PagestreamBeMessageTag {
 // interface allows sending both LSNs, and let the pageserver do the right thing. There was no
 // difference in the responses between V1 and V2.
 //
-// V3 version of protocol adds request ID to all requests. This request ID is also included in response
-// as well as other fields from requests, which allows to verify that we receive response for our request.
-// We copy fields from request to response to make checking more reliable: request ID is formed from process ID
-// and local counter, so in principle there can be duplicated requests IDs if process PID is reused.
-//
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Clone, Copy)]
 pub enum PagestreamProtocolVersion {
    V2,
-    V3,
 }

-pub type RequestId = u64;
-
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
-pub struct PagestreamRequest {
-    pub reqid: RequestId,
+#[derive(Debug, PartialEq, Eq)]
+pub struct PagestreamExistsRequest {
    pub request_lsn: Lsn,
    pub not_modified_since: Lsn,
-}
-
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
-pub struct PagestreamExistsRequest {
-    pub hdr: PagestreamRequest,
    pub rel: RelTag,
 }

-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq)]
 pub struct PagestreamNblocksRequest {
-    pub hdr: PagestreamRequest,
+    pub request_lsn: Lsn,
+    pub not_modified_since: Lsn,
    pub rel: RelTag,
 }

-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq)]
 pub struct PagestreamGetPageRequest {
-    pub hdr: PagestreamRequest,
+    pub request_lsn: Lsn,
+    pub not_modified_since: Lsn,
    pub rel: RelTag,
    pub blkno: u32,
 }

-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq)]
 pub struct PagestreamDbSizeRequest {
-    pub hdr: PagestreamRequest,
+    pub request_lsn: Lsn,
+    pub not_modified_since: Lsn,
    pub dbnode: u32,
 }

-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq)]
 pub struct PagestreamGetSlruSegmentRequest {
-    pub hdr: PagestreamRequest,
+    pub request_lsn: Lsn,
+    pub not_modified_since: Lsn,
    pub kind: u8,
    pub segno: u32,
 }

 #[derive(Debug)]
 pub struct PagestreamExistsResponse {
-    pub req: PagestreamExistsRequest,
    pub exists: bool,
 }

 #[derive(Debug)]
 pub struct PagestreamNblocksResponse {
-    pub req: PagestreamNblocksRequest,
    pub n_blocks: u32,
 }

 #[derive(Debug)]
 pub struct PagestreamGetPageResponse {
-    pub req: PagestreamGetPageRequest,
    pub page: Bytes,
 }

 #[derive(Debug)]
 pub struct PagestreamGetSlruSegmentResponse {
-    pub req: PagestreamGetSlruSegmentRequest,
    pub segment: Bytes,
 }

 #[derive(Debug)]
 pub struct PagestreamErrorResponse {
-    pub req: PagestreamRequest,
    pub message: String,
 }

 #[derive(Debug)]
 pub struct PagestreamDbSizeResponse {
-    pub req: PagestreamDbSizeRequest,
    pub db_size: i64,
 }

@@ -1561,16 +1545,15 @@ pub struct TenantHistorySize {

 impl PagestreamFeMessage {
    /// Serialize a compute -> pageserver message. This is currently only used in testing
-    /// tools. Always uses protocol version 3.
+    /// tools. Always uses protocol version 2.
    pub fn serialize(&self) -> Bytes {
        let mut bytes = BytesMut::new();

        match self {
            Self::Exists(req) => {
                bytes.put_u8(0);
-                bytes.put_u64(req.hdr.reqid);
-                bytes.put_u64(req.hdr.request_lsn.0);
-                bytes.put_u64(req.hdr.not_modified_since.0);
+                bytes.put_u64(req.request_lsn.0);
+                bytes.put_u64(req.not_modified_since.0);
                bytes.put_u32(req.rel.spcnode);
                bytes.put_u32(req.rel.dbnode);
                bytes.put_u32(req.rel.relnode);
@@ -1579,9 +1562,8 @@ impl PagestreamFeMessage {

            Self::Nblocks(req) => {
                bytes.put_u8(1);
-                bytes.put_u64(req.hdr.reqid);
-                bytes.put_u64(req.hdr.request_lsn.0);
-                bytes.put_u64(req.hdr.not_modified_since.0);
+                bytes.put_u64(req.request_lsn.0);
+                bytes.put_u64(req.not_modified_since.0);
                bytes.put_u32(req.rel.spcnode);
                bytes.put_u32(req.rel.dbnode);
                bytes.put_u32(req.rel.relnode);
@@ -1590,9 +1572,8 @@ impl PagestreamFeMessage {

            Self::GetPage(req) => {
                bytes.put_u8(2);
-                bytes.put_u64(req.hdr.reqid);
-                bytes.put_u64(req.hdr.request_lsn.0);
-                bytes.put_u64(req.hdr.not_modified_since.0);
+                bytes.put_u64(req.request_lsn.0);
+                bytes.put_u64(req.not_modified_since.0);
                bytes.put_u32(req.rel.spcnode);
                bytes.put_u32(req.rel.dbnode);
                bytes.put_u32(req.rel.relnode);
@@ -1602,17 +1583,15 @@ impl PagestreamFeMessage {

            Self::DbSize(req) => {
                bytes.put_u8(3);
-                bytes.put_u64(req.hdr.reqid);
-                bytes.put_u64(req.hdr.request_lsn.0);
-                bytes.put_u64(req.hdr.not_modified_since.0);
+                bytes.put_u64(req.request_lsn.0);
+                bytes.put_u64(req.not_modified_since.0);
                bytes.put_u32(req.dbnode);
            }

            Self::GetSlruSegment(req) => {
                bytes.put_u8(4);
-                bytes.put_u64(req.hdr.reqid);
-                bytes.put_u64(req.hdr.request_lsn.0);
-                bytes.put_u64(req.hdr.not_modified_since.0);
+                bytes.put_u64(req.request_lsn.0);
+                bytes.put_u64(req.not_modified_since.0);
                bytes.put_u8(req.kind);
                bytes.put_u32(req.segno);
            }
@@ -1621,35 +1600,21 @@ impl PagestreamFeMessage {
        bytes.into()
    }

-    pub fn parse<R: std::io::Read>(
-        body: &mut R,
-        protocol_version: PagestreamProtocolVersion,
-    ) -> anyhow::Result<PagestreamFeMessage> {
+    pub fn parse<R: std::io::Read>(body: &mut R) -> anyhow::Result<PagestreamFeMessage> {
        // these correspond to the NeonMessageTag enum in pagestore_client.h
        //
        // TODO: consider using protobuf or serde bincode for less error prone
        // serialization.
        let msg_tag = body.read_u8()?;
-        let (reqid, request_lsn, not_modified_since) = match protocol_version {
-            PagestreamProtocolVersion::V2 => (
-                0,
-                Lsn::from(body.read_u64::<BigEndian>()?),
-                Lsn::from(body.read_u64::<BigEndian>()?),
-            ),
-            PagestreamProtocolVersion::V3 => (
-                body.read_u64::<BigEndian>()?,
-                Lsn::from(body.read_u64::<BigEndian>()?),
-                Lsn::from(body.read_u64::<BigEndian>()?),
-            ),
-        };
+
+        // these two fields are the same for every request type
+        let request_lsn = Lsn::from(body.read_u64::<BigEndian>()?);
+        let not_modified_since = Lsn::from(body.read_u64::<BigEndian>()?);

        match msg_tag {
            0 => Ok(PagestreamFeMessage::Exists(PagestreamExistsRequest {
-                hdr: PagestreamRequest {
-                    reqid,
-                    request_lsn,
-                    not_modified_since,
-                },
+                request_lsn,
+                not_modified_since,
                rel: RelTag {
                    spcnode: body.read_u32::<BigEndian>()?,
                    dbnode: body.read_u32::<BigEndian>()?,
@@ -1658,11 +1623,8 @@ impl PagestreamFeMessage {
                },
            })),
            1 => Ok(PagestreamFeMessage::Nblocks(PagestreamNblocksRequest {
-                hdr: PagestreamRequest {
-                    reqid,
-                    request_lsn,
-                    not_modified_since,
-                },
+                request_lsn,
+                not_modified_since,
                rel: RelTag {
                    spcnode: body.read_u32::<BigEndian>()?,
                    dbnode: body.read_u32::<BigEndian>()?,
@@ -1671,11 +1633,8 @@ impl PagestreamFeMessage {
                },
            })),
            2 => Ok(PagestreamFeMessage::GetPage(PagestreamGetPageRequest {
-                hdr: PagestreamRequest {
-                    reqid,
-                    request_lsn,
-                    not_modified_since,
-                },
+                request_lsn,
+                not_modified_since,
                rel: RelTag {
                    spcnode: body.read_u32::<BigEndian>()?,
                    dbnode: body.read_u32::<BigEndian>()?,
@@ -1685,20 +1644,14 @@ impl PagestreamFeMessage {
                blkno: body.read_u32::<BigEndian>()?,
            })),
            3 => Ok(PagestreamFeMessage::DbSize(PagestreamDbSizeRequest {
-                hdr: PagestreamRequest {
-                    reqid,
-                    request_lsn,
-                    not_modified_since,
-                },
+                request_lsn,
+                not_modified_since,
                dbnode: body.read_u32::<BigEndian>()?,
            })),
            4 => Ok(PagestreamFeMessage::GetSlruSegment(
                PagestreamGetSlruSegmentRequest {
-                    hdr: PagestreamRequest {
-                        reqid,
-                        request_lsn,
-                        not_modified_since,
-                    },
+                    request_lsn,
+                    not_modified_since,
                    kind: body.read_u8()?,
                    segno: body.read_u32::<BigEndian>()?,
                },
@@ -1709,114 +1662,43 @@ impl PagestreamFeMessage {
 }

 impl PagestreamBeMessage {
-    pub fn serialize(&self, protocol_version: PagestreamProtocolVersion) -> Bytes {
+    pub fn serialize(&self) -> Bytes {
        let mut bytes = BytesMut::new();

        use PagestreamBeMessageTag as Tag;
-        match protocol_version {
-            PagestreamProtocolVersion::V2 => {
-                match self {
-                    Self::Exists(resp) => {
-                        bytes.put_u8(Tag::Exists as u8);
-                        bytes.put_u8(resp.exists as u8);
-                    }
-
-                    Self::Nblocks(resp) => {
-                        bytes.put_u8(Tag::Nblocks as u8);
-                        bytes.put_u32(resp.n_blocks);
-                    }
-
-                    Self::GetPage(resp) => {
-                        bytes.put_u8(Tag::GetPage as u8);
-                        bytes.put(&resp.page[..])
-                    }
-
-                    Self::Error(resp) => {
-                        bytes.put_u8(Tag::Error as u8);
-                        bytes.put(resp.message.as_bytes());
-                        bytes.put_u8(0); // null terminator
-                    }
-                    Self::DbSize(resp) => {
-                        bytes.put_u8(Tag::DbSize as u8);
-                        bytes.put_i64(resp.db_size);
-                    }
-
-                    Self::GetSlruSegment(resp) => {
-                        bytes.put_u8(Tag::GetSlruSegment as u8);
-                        bytes.put_u32((resp.segment.len() / BLCKSZ as usize) as u32);
-                        bytes.put(&resp.segment[..]);
-                    }
-                }
+        match self {
+            Self::Exists(resp) => {
+                bytes.put_u8(Tag::Exists as u8);
+                bytes.put_u8(resp.exists as u8);
            }
-            PagestreamProtocolVersion::V3 => {
-                match self {
-                    Self::Exists(resp) => {
-                        bytes.put_u8(Tag::Exists as u8);
-                        bytes.put_u64(resp.req.hdr.reqid);
-                        bytes.put_u64(resp.req.hdr.request_lsn.0);
-                        bytes.put_u64(resp.req.hdr.not_modified_since.0);
-                        bytes.put_u32(resp.req.rel.spcnode);
-                        bytes.put_u32(resp.req.rel.dbnode);
-                        bytes.put_u32(resp.req.rel.relnode);
-                        bytes.put_u8(resp.req.rel.forknum);
-                        bytes.put_u8(resp.exists as u8);
-                    }

-                    Self::Nblocks(resp) => {
-                        bytes.put_u8(Tag::Nblocks as u8);
-                        bytes.put_u64(resp.req.hdr.reqid);
-                        bytes.put_u64(resp.req.hdr.request_lsn.0);
-                        bytes.put_u64(resp.req.hdr.not_modified_since.0);
-                        bytes.put_u32(resp.req.rel.spcnode);
-                        bytes.put_u32(resp.req.rel.dbnode);
-                        bytes.put_u32(resp.req.rel.relnode);
-                        bytes.put_u8(resp.req.rel.forknum);
-                        bytes.put_u32(resp.n_blocks);
-                    }
+            Self::Nblocks(resp) => {
+                bytes.put_u8(Tag::Nblocks as u8);
+                bytes.put_u32(resp.n_blocks);
+            }

-                    Self::GetPage(resp) => {
-                        bytes.put_u8(Tag::GetPage as u8);
-                        bytes.put_u64(resp.req.hdr.reqid);
-                        bytes.put_u64(resp.req.hdr.request_lsn.0);
-                        bytes.put_u64(resp.req.hdr.not_modified_since.0);
-                        bytes.put_u32(resp.req.rel.spcnode);
-                        bytes.put_u32(resp.req.rel.dbnode);
-                        bytes.put_u32(resp.req.rel.relnode);
-                        bytes.put_u8(resp.req.rel.forknum);
-                        bytes.put_u32(resp.req.blkno);
-                        bytes.put(&resp.page[..])
-                    }
+            Self::GetPage(resp) => {
+                bytes.put_u8(Tag::GetPage as u8);
+                bytes.put(&resp.page[..]);
+            }

-                    Self::Error(resp) => {
-                        bytes.put_u8(Tag::Error as u8);
-                        bytes.put_u64(resp.req.reqid);
-                        bytes.put_u64(resp.req.request_lsn.0);
-                        bytes.put_u64(resp.req.not_modified_since.0);
-                        bytes.put(resp.message.as_bytes());
-                        bytes.put_u8(0); // null terminator
-                    }
-                    Self::DbSize(resp) => {
-                        bytes.put_u8(Tag::DbSize as u8);
-                        bytes.put_u64(resp.req.hdr.reqid);
-                        bytes.put_u64(resp.req.hdr.request_lsn.0);
-                        bytes.put_u64(resp.req.hdr.not_modified_since.0);
-                        bytes.put_u32(resp.req.dbnode);
-                        bytes.put_i64(resp.db_size);
-                    }
+            Self::Error(resp) => {
+                bytes.put_u8(Tag::Error as u8);
+                bytes.put(resp.message.as_bytes());
+                bytes.put_u8(0); // null terminator
+            }
+            Self::DbSize(resp) => {
+                bytes.put_u8(Tag::DbSize as u8);
+                bytes.put_i64(resp.db_size);
+            }

-                    Self::GetSlruSegment(resp) => {
-                        bytes.put_u8(Tag::GetSlruSegment as u8);
-                        bytes.put_u64(resp.req.hdr.reqid);
-                        bytes.put_u64(resp.req.hdr.request_lsn.0);
-                        bytes.put_u64(resp.req.hdr.not_modified_since.0);
-                        bytes.put_u8(resp.req.kind);
-                        bytes.put_u32(resp.req.segno);
-                        bytes.put_u32((resp.segment.len() / BLCKSZ as usize) as u32);
-                        bytes.put(&resp.segment[..]);
-                    }
-                }
+            Self::GetSlruSegment(resp) => {
+                bytes.put_u8(Tag::GetSlruSegment as u8);
+                bytes.put_u32((resp.segment.len() / BLCKSZ as usize) as u32);
+                bytes.put(&resp.segment[..]);
            }
        }
+
        bytes.into()
    }

@@ -1828,131 +1710,38 @@ impl PagestreamBeMessage {
        let ok =
            match Tag::try_from(msg_tag).map_err(|tag: u8| anyhow::anyhow!("invalid tag {tag}"))? {
                Tag::Exists => {
-                    let reqid = buf.read_u64::<BigEndian>()?;
-                    let request_lsn = Lsn(buf.read_u64::<BigEndian>()?);
-                    let not_modified_since = Lsn(buf.read_u64::<BigEndian>()?);
-                    let rel = RelTag {
-                        spcnode: buf.read_u32::<BigEndian>()?,
-                        dbnode: buf.read_u32::<BigEndian>()?,
-                        relnode: buf.read_u32::<BigEndian>()?,
-                        forknum: buf.read_u8()?,
-                    };
-                    let exists = buf.read_u8()? != 0;
+                    let exists = buf.read_u8()?;
                    Self::Exists(PagestreamExistsResponse {
-                        req: PagestreamExistsRequest {
-                            hdr: PagestreamRequest {
-                                reqid,
-                                request_lsn,
-                                not_modified_since,
-                            },
-                            rel,
-                        },
-                        exists,
+                        exists: exists != 0,
                    })
                }
                Tag::Nblocks => {
-                    let reqid = buf.read_u64::<BigEndian>()?;
-                    let request_lsn = Lsn(buf.read_u64::<BigEndian>()?);
-                    let not_modified_since = Lsn(buf.read_u64::<BigEndian>()?);
-                    let rel = RelTag {
-                        spcnode: buf.read_u32::<BigEndian>()?,
-                        dbnode: buf.read_u32::<BigEndian>()?,
-                        relnode: buf.read_u32::<BigEndian>()?,
-                        forknum: buf.read_u8()?,
-                    };
                    let n_blocks = buf.read_u32::<BigEndian>()?;
-                    Self::Nblocks(PagestreamNblocksResponse {
-                        req: PagestreamNblocksRequest {
-                            hdr: PagestreamRequest {
-                                reqid,
-                                request_lsn,
-                                not_modified_since,
-                            },
-                            rel,
-                        },
-                        n_blocks,
-                    })
+                    Self::Nblocks(PagestreamNblocksResponse { n_blocks })
                }
                Tag::GetPage => {
-                    let reqid = buf.read_u64::<BigEndian>()?;
-                    let request_lsn = Lsn(buf.read_u64::<BigEndian>()?);
-                    let not_modified_since = Lsn(buf.read_u64::<BigEndian>()?);
-                    let rel = RelTag {
-                        spcnode: buf.read_u32::<BigEndian>()?,
-                        dbnode: buf.read_u32::<BigEndian>()?,
-                        relnode: buf.read_u32::<BigEndian>()?,
-                        forknum: buf.read_u8()?,
-                    };
-                    let blkno = buf.read_u32::<BigEndian>()?;
                    let mut page = vec![0; 8192]; // TODO: use MaybeUninit
                    buf.read_exact(&mut page)?;
-                    Self::GetPage(PagestreamGetPageResponse {
-                        req: PagestreamGetPageRequest {
-                            hdr: PagestreamRequest {
-                                reqid,
-                                request_lsn,
-                                not_modified_since,
-                            },
-                            rel,
-                            blkno,
-                        },
-                        page: page.into(),
-                    })
+                    PagestreamBeMessage::GetPage(PagestreamGetPageResponse { page: page.into() })
                }
                Tag::Error => {
-                    let reqid = buf.read_u64::<BigEndian>()?;
-                    let request_lsn = Lsn(buf.read_u64::<BigEndian>()?);
-                    let not_modified_since = Lsn(buf.read_u64::<BigEndian>()?);
                    let mut msg = Vec::new();
                    buf.read_until(0, &mut msg)?;
                    let cstring = std::ffi::CString::from_vec_with_nul(msg)?;
                    let rust_str = cstring.to_str()?;
-                    Self::Error(PagestreamErrorResponse {
-                        req: PagestreamRequest {
-                            reqid,
-                            request_lsn,
-                            not_modified_since,
-                        },
+                    PagestreamBeMessage::Error(PagestreamErrorResponse {
                        message: rust_str.to_owned(),
                    })
                }
                Tag::DbSize => {
-                    let reqid = buf.read_u64::<BigEndian>()?;
-                    let request_lsn = Lsn(buf.read_u64::<BigEndian>()?);
-                    let not_modified_since = Lsn(buf.read_u64::<BigEndian>()?);
-                    let dbnode = buf.read_u32::<BigEndian>()?;
                    let db_size = buf.read_i64::<BigEndian>()?;
-                    Self::DbSize(PagestreamDbSizeResponse {
-                        req: PagestreamDbSizeRequest {
-                            hdr: PagestreamRequest {
-                                reqid,
-                                request_lsn,
-                                not_modified_since,
-                            },
-                            dbnode,
-                        },
-                        db_size,
-                    })
+                    Self::DbSize(PagestreamDbSizeResponse { db_size })
                }
                Tag::GetSlruSegment => {
-                    let reqid = buf.read_u64::<BigEndian>()?;
-                    let request_lsn = Lsn(buf.read_u64::<BigEndian>()?);
-                    let not_modified_since = Lsn(buf.read_u64::<BigEndian>()?);
-                    let kind = buf.read_u8()?;
-                    let segno = buf.read_u32::<BigEndian>()?;
                    let n_blocks = buf.read_u32::<BigEndian>()?;
                    let mut segment = vec![0; n_blocks as usize * BLCKSZ as usize];
                    buf.read_exact(&mut segment)?;
                    Self::GetSlruSegment(PagestreamGetSlruSegmentResponse {
-                        req: PagestreamGetSlruSegmentRequest {
-                            hdr: PagestreamRequest {
-                                reqid,
-                                request_lsn,
-                                not_modified_since,
-                            },
-                            kind,
-                            segno,
-                        },
                        segment: segment.into(),
                    })
                }
@@ -1991,11 +1780,8 @@ mod tests {
        // Test serialization/deserialization of PagestreamFeMessage
        let messages = vec![
            PagestreamFeMessage::Exists(PagestreamExistsRequest {
-                hdr: PagestreamRequest {
-                    reqid: 0,
-                    request_lsn: Lsn(4),
-                    not_modified_since: Lsn(3),
-                },
+                request_lsn: Lsn(4),
+                not_modified_since: Lsn(3),
                rel: RelTag {
                    forknum: 1,
                    spcnode: 2,
@@ -2004,11 +1790,8 @@ mod tests {
                },
            }),
            PagestreamFeMessage::Nblocks(PagestreamNblocksRequest {
-                hdr: PagestreamRequest {
-                    reqid: 0,
-                    request_lsn: Lsn(4),
-                    not_modified_since: Lsn(4),
-                },
+                request_lsn: Lsn(4),
+                not_modified_since: Lsn(4),
                rel: RelTag {
                    forknum: 1,
                    spcnode: 2,
@@ -2017,11 +1800,8 @@ mod tests {
                },
            }),
            PagestreamFeMessage::GetPage(PagestreamGetPageRequest {
-                hdr: PagestreamRequest {
-                    reqid: 0,
-                    request_lsn: Lsn(4),
-                    not_modified_since: Lsn(3),
-                },
+                request_lsn: Lsn(4),
+                not_modified_since: Lsn(3),
                rel: RelTag {
                    forknum: 1,
                    spcnode: 2,
@@ -2031,19 +1811,14 @@ mod tests {
                blkno: 7,
            }),
            PagestreamFeMessage::DbSize(PagestreamDbSizeRequest {
-                hdr: PagestreamRequest {
-                    reqid: 0,
-                    request_lsn: Lsn(4),
-                    not_modified_since: Lsn(3),
-                },
+                request_lsn: Lsn(4),
+                not_modified_since: Lsn(3),
                dbnode: 7,
            }),
        ];
        for msg in messages {
            let bytes = msg.serialize();
-            let reconstructed =
-                PagestreamFeMessage::parse(&mut bytes.reader(), PagestreamProtocolVersion::V3)
-                    .unwrap();
+            let reconstructed = PagestreamFeMessage::parse(&mut bytes.reader()).unwrap();
            assert!(msg == reconstructed);
        }
    }
--- a/libs/proxy/tokio-postgres2/src/connection.rs
+++ b/libs/proxy/tokio-postgres2/src/connection.rs
@@ -33,12 +33,8 @@ pub struct Response {
 #[derive(PartialEq, Debug)]
 enum State {
    Active,
-    Closing,
-}
-
-enum WriteReady {
    Terminating,
-    WaitingOnRead,
+    Closing,
 }

 /// A connection to a PostgreSQL database.
@@ -55,6 +51,7 @@ pub struct Connection<S, T> {
    /// HACK: we need this in the Neon Proxy to forward params.
    pub parameters: HashMap<String, String>,
    receiver: mpsc::UnboundedReceiver<Request>,
+    pending_request: Option<RequestMessages>,
    pending_responses: VecDeque<BackendMessage>,
    responses: VecDeque<Response>,
    state: State,
@@ -75,6 +72,7 @@ where
            stream,
            parameters,
            receiver,
+            pending_request: None,
            pending_responses,
            responses: VecDeque::new(),
            state: State::Active,
@@ -95,23 +93,26 @@ where
            .map(|o| o.map(|r| r.map_err(Error::io)))
    }

-    /// Read and process messages from the connection to postgres.
-    /// client <- postgres
-    fn poll_read(&mut self, cx: &mut Context<'_>) -> Poll<Result<AsyncMessage, Error>> {
+    fn poll_read(&mut self, cx: &mut Context<'_>) -> Result<Option<AsyncMessage>, Error> {
+        if self.state != State::Active {
+            trace!("poll_read: done");
+            return Ok(None);
+        }
+
        loop {
            let message = match self.poll_response(cx)? {
                Poll::Ready(Some(message)) => message,
-                Poll::Ready(None) => return Poll::Ready(Err(Error::closed())),
+                Poll::Ready(None) => return Err(Error::closed()),
                Poll::Pending => {
                    trace!("poll_read: waiting on response");
-                    return Poll::Pending;
+                    return Ok(None);
                }
            };

            let (mut messages, request_complete) = match message {
                BackendMessage::Async(Message::NoticeResponse(body)) => {
                    let error = DbError::parse(&mut body.fields()).map_err(Error::parse)?;
-                    return Poll::Ready(Ok(AsyncMessage::Notice(error)));
+                    return Ok(Some(AsyncMessage::Notice(error)));
                }
                BackendMessage::Async(Message::NotificationResponse(body)) => {
                    let notification = Notification {
@@ -119,7 +120,7 @@ where
                        channel: body.channel().map_err(Error::parse)?.to_string(),
                        payload: body.message().map_err(Error::parse)?.to_string(),
                    };
-                    return Poll::Ready(Ok(AsyncMessage::Notification(notification)));
+                    return Ok(Some(AsyncMessage::Notification(notification)));
                }
                BackendMessage::Async(Message::ParameterStatus(body)) => {
                    self.parameters.insert(
@@ -138,10 +139,8 @@ where
            let mut response = match self.responses.pop_front() {
                Some(response) => response,
                None => match messages.next().map_err(Error::parse)? {
-                    Some(Message::ErrorResponse(error)) => {
-                        return Poll::Ready(Err(Error::db(error)))
-                    }
-                    _ => return Poll::Ready(Err(Error::unexpected_message())),
+                    Some(Message::ErrorResponse(error)) => return Err(Error::db(error)),
+                    _ => return Err(Error::unexpected_message()),
                },
            };

@@ -165,14 +164,18 @@ where
                        request_complete,
                    });
                    trace!("poll_read: waiting on sender");
-                    return Poll::Pending;
+                    return Ok(None);
                }
            }
        }
    }

-    /// Fetch the next client request and enqueue the response sender.
    fn poll_request(&mut self, cx: &mut Context<'_>) -> Poll<Option<RequestMessages>> {
+        if let Some(messages) = self.pending_request.take() {
+            trace!("retrying pending request");
+            return Poll::Ready(Some(messages));
+        }
+
        if self.receiver.is_closed() {
            return Poll::Ready(None);
        }
@@ -190,80 +193,74 @@ where
        }
    }

-    /// Process client requests and write them to the postgres connection, flushing if necessary.
-    /// client -> postgres
-    fn poll_write(&mut self, cx: &mut Context<'_>) -> Poll<Result<WriteReady, Error>> {
+    fn poll_write(&mut self, cx: &mut Context<'_>) -> Result<bool, Error> {
        loop {
+            if self.state == State::Closing {
+                trace!("poll_write: done");
+                return Ok(false);
+            }
+
            if Pin::new(&mut self.stream)
                .poll_ready(cx)
                .map_err(Error::io)?
                .is_pending()
            {
                trace!("poll_write: waiting on socket");
-
-                // poll_ready is self-flushing.
-                return Poll::Pending;
+                return Ok(false);
            }

-            match self.poll_request(cx) {
-                // send the message to postgres
-                Poll::Ready(Some(RequestMessages::Single(request))) => {
-                    Pin::new(&mut self.stream)
-                        .start_send(request)
-                        .map_err(Error::io)?;
-                }
-                // No more messages from the client, and no more responses to wait for.
-                // Send a terminate message to postgres
-                Poll::Ready(None) if self.responses.is_empty() => {
+            let request = match self.poll_request(cx) {
+                Poll::Ready(Some(request)) => request,
+                Poll::Ready(None) if self.responses.is_empty() && self.state == State::Active => {
                    trace!("poll_write: at eof, terminating");
+                    self.state = State::Terminating;
                    let mut request = BytesMut::new();
                    frontend::terminate(&mut request);
-                    let request = FrontendMessage::Raw(request.freeze());
-
-                    Pin::new(&mut self.stream)
-                        .start_send(request)
-                        .map_err(Error::io)?;
-
-                    trace!("poll_write: sent eof, closing");
-                    trace!("poll_write: done");
-                    return Poll::Ready(Ok(WriteReady::Terminating));
+                    RequestMessages::Single(FrontendMessage::Raw(request.freeze()))
                }
-                // No more messages from the client, but there are still some responses to wait for.
                Poll::Ready(None) => {
                    trace!(
                        "poll_write: at eof, pending responses {}",
                        self.responses.len()
                    );
-                    ready!(self.poll_flush(cx))?;
-                    return Poll::Ready(Ok(WriteReady::WaitingOnRead));
+                    return Ok(true);
                }
-                // Still waiting for a message from the client.
                Poll::Pending => {
                    trace!("poll_write: waiting on request");
-                    ready!(self.poll_flush(cx))?;
-                    return Poll::Pending;
+                    return Ok(true);
+                }
+            };
+
+            match request {
+                RequestMessages::Single(request) => {
+                    Pin::new(&mut self.stream)
+                        .start_send(request)
+                        .map_err(Error::io)?;
+                    if self.state == State::Terminating {
+                        trace!("poll_write: sent eof, closing");
+                        self.state = State::Closing;
+                    }
                }
            }
        }
    }

-    fn poll_flush(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Error>> {
+    fn poll_flush(&mut self, cx: &mut Context<'_>) -> Result<(), Error> {
        match Pin::new(&mut self.stream)
            .poll_flush(cx)
            .map_err(Error::io)?
        {
-            Poll::Ready(()) => {
-                trace!("poll_flush: flushed");
-                Poll::Ready(Ok(()))
-            }
-            Poll::Pending => {
-                trace!("poll_flush: waiting on socket");
-                Poll::Pending
-            }
+            Poll::Ready(()) => trace!("poll_flush: flushed"),
+            Poll::Pending => trace!("poll_flush: waiting on socket"),
        }
+        Ok(())
    }

    fn poll_shutdown(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Error>> {
+        if self.state != State::Closing {
+            return Poll::Pending;
+        }
+
        match Pin::new(&mut self.stream)
            .poll_close(cx)
            .map_err(Error::io)?
@@ -292,30 +289,18 @@ where
        &mut self,
        cx: &mut Context<'_>,
    ) -> Poll<Option<Result<AsyncMessage, Error>>> {
-        if self.state != State::Closing {
-            // if the state is still active, try read from and write to postgres.
-            let message = self.poll_read(cx)?;
-            let closing = self.poll_write(cx)?;
-            if let Poll::Ready(WriteReady::Terminating) = closing {
-                self.state = State::Closing;
-            }
-
-            if let Poll::Ready(message) = message {
-                return Poll::Ready(Some(Ok(message)));
-            }
-
-            // poll_read returned Pending.
-            // poll_write returned Pending or Ready(WriteReady::WaitingOnRead).
-            // if poll_write returned Ready(WriteReady::WaitingOnRead), then we are waiting to read more data from postgres.
-            if self.state != State::Closing {
-                return Poll::Pending;
-            }
+        let message = self.poll_read(cx)?;
+        let want_flush = self.poll_write(cx)?;
+        if want_flush {
+            self.poll_flush(cx)?;
        }
-
-        match self.poll_shutdown(cx) {
-            Poll::Ready(Ok(())) => Poll::Ready(None),
-            Poll::Ready(Err(e)) => Poll::Ready(Some(Err(e))),
-            Poll::Pending => Poll::Pending,
+        match message {
+            Some(message) => Poll::Ready(Some(Ok(message))),
+            None => match self.poll_shutdown(cx) {
+                Poll::Ready(Ok(())) => Poll::Ready(None),
+                Poll::Ready(Err(e)) => Poll::Ready(Some(Err(e))),
+                Poll::Pending => Poll::Pending,
+            },
        }
    }
 }
--- a/libs/remote_storage/src/config.rs
+++ b/libs/remote_storage/src/config.rs
@@ -115,15 +115,13 @@ fn default_max_keys_per_list_response() -> Option<i32> {
 }

 fn default_azure_conn_pool_size() -> usize {
-    // By default, the Azure SDK does no connection pooling, due to historic reports of hard-to-reproduce issues
+    // Conservative default: no connection pooling.  At time of writing this is the Azure
+    // SDK's default as well, due to historic reports of hard-to-reproduce issues
    // (https://github.com/hyperium/hyper/issues/2312)
    //
    // However, using connection pooling is important to avoid exhausting client ports when
    // doing huge numbers of requests (https://github.com/neondatabase/cloud/issues/20971)
-    //
-    // We therefore enable a modest pool size by default: this may be configured to zero if
-    // issues like the alleged upstream hyper issue appear.
-    8
+    0
 }

 impl Debug for S3Config {
--- a/libs/tracing-utils/src/lib.rs
+++ b/libs/tracing-utils/src/lib.rs
@@ -38,6 +38,7 @@ pub mod http;

 use opentelemetry::trace::TracerProvider;
 use opentelemetry::KeyValue;
+use opentelemetry_sdk::Resource;
 use tracing::Subscriber;
 use tracing_subscriber::registry::LookupSpan;
 use tracing_subscriber::Layer;
@@ -120,10 +121,7 @@ where
    S: Subscriber + for<'span> LookupSpan<'span>,
 {
    // Sets up exporter from the OTEL_EXPORTER_* environment variables.
-    let exporter = opentelemetry_otlp::SpanExporter::builder()
-        .with_http()
-        .build()
-        .expect("could not initialize opentelemetry exporter");
+    let exporter = opentelemetry_otlp::new_exporter().http();

    // TODO: opentelemetry::global::set_error_handler() with custom handler that
    //       bypasses default tracing layers, but logs regular looking log
@@ -134,13 +132,17 @@ where
        opentelemetry_sdk::propagation::TraceContextPropagator::new(),
    );

-    let tracer = opentelemetry_sdk::trace::TracerProvider::builder()
-        .with_batch_exporter(exporter, opentelemetry_sdk::runtime::Tokio)
-        .with_resource(opentelemetry_sdk::Resource::new(vec![KeyValue::new(
-            opentelemetry_semantic_conventions::resource::SERVICE_NAME,
-            service_name,
-        )]))
-        .build()
+    let tracer = opentelemetry_otlp::new_pipeline()
+        .tracing()
+        .with_exporter(exporter)
+        .with_trace_config(opentelemetry_sdk::trace::Config::default().with_resource(
+            Resource::new(vec![KeyValue::new(
+                opentelemetry_semantic_conventions::resource::SERVICE_NAME,
+                service_name,
+            )]),
+        ))
+        .install_batch(opentelemetry_sdk::runtime::Tokio)
+        .expect("could not initialize opentelemetry exporter")
        .tracer("global");

    tracing_opentelemetry::layer().with_tracer(tracer)
--- a/libs/utils/Cargo.toml
+++ b/libs/utils/Cargo.toml
@@ -26,7 +26,6 @@ git-version.workspace = true
 hex = { workspace = true, features = ["serde"] }
 humantime.workspace = true
 hyper0 = { workspace = true, features = ["full"] }
-inferno.workspace = true
 itertools.workspace = true
 fail.workspace = true
 futures = { workspace = true }
--- a/libs/utils/src/failpoint_support.rs
+++ b/libs/utils/src/failpoint_support.rs
@@ -9,7 +9,7 @@ use serde::{Deserialize, Serialize};
 use tokio_util::sync::CancellationToken;
 use tracing::*;

-/// Declare a failpoint that can use to `pause` failpoint action.
+/// Declare a failpoint that can use the `pause` failpoint action.
 /// We don't want to block the executor thread, hence, spawn_blocking + await.
 #[macro_export]
 macro_rules! pausable_failpoint {
@@ -181,7 +181,7 @@ pub async fn failpoints_handler(
 ) -> Result<Response<Body>, ApiError> {
    if !fail::has_failpoints() {
        return Err(ApiError::BadRequest(anyhow::anyhow!(
-            "Cannot manage failpoints because neon was compiled without failpoints support"
+            "Cannot manage failpoints because storage was compiled without failpoints support"
        )));
    }

--- a/libs/utils/src/http/endpoint.rs
+++ b/libs/utils/src/http/endpoint.rs
@@ -417,7 +417,6 @@ pub async fn profile_heap_handler(req: Request<Body>) -> Result<Response<Body>,
    enum Format {
        Jemalloc,
        Pprof,
-        Svg,
    }

    // Parameters.
@@ -425,24 +424,9 @@ pub async fn profile_heap_handler(req: Request<Body>) -> Result<Response<Body>,
        None => Format::Pprof,
        Some("jemalloc") => Format::Jemalloc,
        Some("pprof") => Format::Pprof,
-        Some("svg") => Format::Svg,
        Some(format) => return Err(ApiError::BadRequest(anyhow!("invalid format {format}"))),
    };

-    // Functions and mappings to strip when symbolizing pprof profiles. If true,
-    // also remove child frames.
-    static STRIP_FUNCTIONS: Lazy<Vec<(Regex, bool)>> = Lazy::new(|| {
-        vec![
-            (Regex::new("^__rust").unwrap(), false),
-            (Regex::new("^_start$").unwrap(), false),
-            (Regex::new("^irallocx_prof").unwrap(), true),
-            (Regex::new("^prof_alloc_prep").unwrap(), true),
-            (Regex::new("^std::rt::lang_start").unwrap(), false),
-            (Regex::new("^std::sys::backtrace::__rust").unwrap(), false),
-        ]
-    });
-    const STRIP_MAPPINGS: &[&str] = &["libc", "libgcc", "pthread", "vdso"];
-
    // Obtain profiler handle.
    let mut prof_ctl = jemalloc_pprof::PROF_CTL
        .as_ref()
@@ -480,9 +464,24 @@ pub async fn profile_heap_handler(req: Request<Body>) -> Result<Response<Body>,
                // Symbolize the profile.
                // TODO: consider moving this upstream to jemalloc_pprof and avoiding the
                // serialization roundtrip.
+                static STRIP_FUNCTIONS: Lazy<Vec<(Regex, bool)>> = Lazy::new(|| {
+                    // Functions to strip from profiles. If true, also remove child frames.
+                    vec![
+                        (Regex::new("^__rust").unwrap(), false),
+                        (Regex::new("^_start$").unwrap(), false),
+                        (Regex::new("^irallocx_prof").unwrap(), true),
+                        (Regex::new("^prof_alloc_prep").unwrap(), true),
+                        (Regex::new("^std::rt::lang_start").unwrap(), false),
+                        (Regex::new("^std::sys::backtrace::__rust").unwrap(), false),
+                    ]
+                });
                let profile = pprof::decode(&bytes)?;
                let profile = pprof::symbolize(profile)?;
-                let profile = pprof::strip_locations(profile, STRIP_MAPPINGS, &STRIP_FUNCTIONS);
+                let profile = pprof::strip_locations(
+                    profile,
+                    &["libc", "libgcc", "pthread", "vdso"],
+                    &STRIP_FUNCTIONS,
+                );
                pprof::encode(&profile)
            })
            .await
@@ -495,27 +494,6 @@ pub async fn profile_heap_handler(req: Request<Body>) -> Result<Response<Body>,
                .body(Body::from(data))
                .map_err(|err| ApiError::InternalServerError(err.into()))
        }
-
-        Format::Svg => {
-            let body = tokio::task::spawn_blocking(move || {
-                let bytes = prof_ctl.dump_pprof()?;
-                let profile = pprof::decode(&bytes)?;
-                let profile = pprof::symbolize(profile)?;
-                let profile = pprof::strip_locations(profile, STRIP_MAPPINGS, &STRIP_FUNCTIONS);
-                let mut opts = inferno::flamegraph::Options::default();
-                opts.title = "Heap inuse".to_string();
-                opts.count_name = "bytes".to_string();
-                pprof::flamegraph(profile, &mut opts)
-            })
-            .await
-            .map_err(|join_err| ApiError::InternalServerError(join_err.into()))?
-            .map_err(ApiError::InternalServerError)?;
-            Response::builder()
-                .status(200)
-                .header(CONTENT_TYPE, "image/svg+xml")
-                .body(Body::from(body))
-                .map_err(|err| ApiError::InternalServerError(err.into()))
-        }
    }
 }

--- a/libs/utils/src/pprof.rs
+++ b/libs/utils/src/pprof.rs
@@ -1,9 +1,8 @@
-use anyhow::bail;
 use flate2::write::{GzDecoder, GzEncoder};
 use flate2::Compression;
 use itertools::Itertools as _;
 use once_cell::sync::Lazy;
-use pprof::protos::{Function, Line, Location, Message as _, Profile};
+use pprof::protos::{Function, Line, Message as _, Profile};
 use regex::Regex;

 use std::borrow::Cow;
@@ -189,59 +188,3 @@ pub fn strip_locations(

    profile
 }
-
-/// Generates an SVG flamegraph from a symbolized pprof profile.
-pub fn flamegraph(
-    profile: Profile,
-    opts: &mut inferno::flamegraph::Options,
-) -> anyhow::Result<Vec<u8>> {
-    if profile.mapping.iter().any(|m| !m.has_functions) {
-        bail!("profile not symbolized");
-    }
-
-    // Index locations, functions, and strings.
-    let locations: HashMap<u64, Location> =
-        profile.location.into_iter().map(|l| (l.id, l)).collect();
-    let functions: HashMap<u64, Function> =
-        profile.function.into_iter().map(|f| (f.id, f)).collect();
-    let strings = profile.string_table;
-
-    // Resolve stacks as function names, and sum sample values per stack. Also reverse the stack,
-    // since inferno expects it bottom-up.
-    let mut stacks: HashMap<Vec<&str>, i64> = HashMap::new();
-    for sample in profile.sample {
-        let mut stack = Vec::with_capacity(sample.location_id.len());
-        for location in sample.location_id.into_iter().rev() {
-            let Some(location) = locations.get(&location) else {
-                bail!("missing location {location}");
-            };
-            for line in location.line.iter().rev() {
-                let Some(function) = functions.get(&line.function_id) else {
-                    bail!("missing function {}", line.function_id);
-                };
-                let Some(name) = strings.get(function.name as usize) else {
-                    bail!("missing string {}", function.name);
-                };
-                stack.push(name.as_str());
-            }
-        }
-        let Some(&value) = sample.value.first() else {
-            bail!("missing value");
-        };
-        *stacks.entry(stack).or_default() += value;
-    }
-
-    // Construct stack lines for inferno.
-    let lines = stacks
-        .into_iter()
-        .map(|(stack, value)| (stack.into_iter().join(";"), value))
-        .map(|(stack, value)| format!("{stack} {value}"))
-        .sorted()
-        .collect_vec();
-
-    // Construct the flamegraph.
-    let mut bytes = Vec::new();
-    let lines = lines.iter().map(|line| line.as_str());
-    inferno::flamegraph::from_lines(opts, lines, &mut bytes)?;
-    Ok(bytes)
-}
--- a/libs/utils/src/sync/spsc_fold.rs
+++ b/libs/utils/src/sync/spsc_fold.rs
@@ -96,11 +96,7 @@ impl<T: Send> Sender<T> {
                    }
                }
                State::SenderWaitsForReceiverToConsume(_data) => {
-                    // SAFETY: send is single threaded due to `&mut self` requirement,
-                    // therefore register is not concurrent.
-                    unsafe {
-                        self.state.wake_sender.register(cx.waker());
-                    }
+                    // Really, we shouldn't be polled until receiver has consumed and wakes us.
                    Poll::Pending
                }
                State::ReceiverGone => Poll::Ready(Err(SendError::ReceiverGone)),
@@ -453,38 +449,4 @@ mod tests {
        let err = recv_task.await.unwrap().expect_err("should error");
        assert!(matches!(err, RecvError::SenderGone));
    }
-
-    #[tokio::test(start_paused = true)]
-    async fn test_receiver_drop_while_waiting_for_receiver_to_consume_unblocks_sender() {
-        let (mut sender, receiver) = channel();
-
-        let state = receiver.state.clone();
-
-        sender.send((), |_, _| unreachable!()).await.unwrap();
-
-        assert!(matches!(&*state.value.lock().unwrap(), &State::HasData(_)));
-
-        let unmergeable = sender.send((), |_, _| Err(()));
-        let mut unmergeable = std::pin::pin!(unmergeable);
-        tokio::select! {
-            _ = tokio::time::sleep(FOREVER) => {},
-            _ = &mut unmergeable => {
-                panic!("unmergeable should not complete");
-            },
-        }
-
-        assert!(matches!(
-            &*state.value.lock().unwrap(),
-            &State::SenderWaitsForReceiverToConsume(_)
-        ));
-
-        drop(receiver);
-
-        assert!(matches!(
-            &*state.value.lock().unwrap(),
-            &State::ReceiverGone
-        ));
-
-        unmergeable.await.unwrap_err();
-    }
 }
--- a/libs/wal_decoder/src/models.rs
+++ b/libs/wal_decoder/src/models.rs
@@ -95,14 +95,6 @@ impl InterpretedWalRecord {
            && self.metadata_record.is_none()
            && matches!(self.flush_uncommitted, FlushUncommittedRecords::No)
    }
-
-    /// Checks if the WAL record is observed (i.e. contains only metadata
-    /// for observed values)
-    pub fn is_observed(&self) -> bool {
-        self.batch.is_observed()
-            && self.metadata_record.is_none()
-            && matches!(self.flush_uncommitted, FlushUncommittedRecords::No)
-    }
 }

 /// The interpreted part of the Postgres WAL record which requires metadata
--- a/libs/wal_decoder/src/serialized_batch.rs
+++ b/libs/wal_decoder/src/serialized_batch.rs
@@ -501,11 +501,6 @@ impl SerializedValueBatch {
        !self.has_data() && self.metadata.is_empty()
    }

-    /// Checks if the batch contains only observed values
-    pub fn is_observed(&self) -> bool {
-        !self.has_data() && !self.metadata.is_empty()
-    }
-
    /// Checks if the batch contains data
    ///
    /// Note that if this returns false, it may still contain observed values or
--- a/pageserver/client/src/page_service.rs
+++ b/pageserver/client/src/page_service.rs
@@ -60,7 +60,7 @@ impl Client {
    ) -> anyhow::Result<PagestreamClient> {
        let copy_both: tokio_postgres::CopyBothDuplex<bytes::Bytes> = self
            .client
-            .copy_both_simple(&format!("pagestream_v3 {tenant_id} {timeline_id}"))
+            .copy_both_simple(&format!("pagestream_v2 {tenant_id} {timeline_id}"))
            .await?;
        let Client {
            cancel_on_client_drop,
--- a/pageserver/pagebench/src/cmd/getpage_latest_lsn.rs
+++ b/pageserver/pagebench/src/cmd/getpage_latest_lsn.rs
@@ -2,7 +2,7 @@ use anyhow::Context;
 use camino::Utf8PathBuf;
 use pageserver_api::key::Key;
 use pageserver_api::keyspace::KeySpaceAccum;
-use pageserver_api::models::{PagestreamGetPageRequest, PagestreamRequest};
+use pageserver_api::models::PagestreamGetPageRequest;

 use pageserver_api::shard::TenantShardId;
 use tokio_util::sync::CancellationToken;
@@ -322,15 +322,12 @@ async fn main_impl(
                        .to_rel_block()
                        .expect("we filter non-rel-block keys out above");
                    PagestreamGetPageRequest {
-                        hdr: PagestreamRequest {
-                            reqid: 0,
-                            request_lsn: if rng.gen_bool(args.req_latest_probability) {
-                                Lsn::MAX
-                            } else {
-                                r.timeline_lsn
-                            },
-                            not_modified_since: r.timeline_lsn,
+                        request_lsn: if rng.gen_bool(args.req_latest_probability) {
+                            Lsn::MAX
+                        } else {
+                            r.timeline_lsn
                        },
+                        not_modified_since: r.timeline_lsn,
                        rel: rel_tag,
                        blkno: block_no,
                    }
--- a/pageserver/src/metrics.rs
+++ b/pageserver/src/metrics.rs
@@ -3,7 +3,7 @@ use metrics::{
    register_counter_vec, register_gauge_vec, register_histogram, register_histogram_vec,
    register_int_counter, register_int_counter_pair_vec, register_int_counter_vec,
    register_int_gauge, register_int_gauge_vec, register_uint_gauge, register_uint_gauge_vec,
-    Counter, CounterVec, Gauge, GaugeVec, Histogram, HistogramVec, IntCounter, IntCounterPair,
+    Counter, CounterVec, GaugeVec, Histogram, HistogramVec, IntCounter, IntCounterPair,
    IntCounterPairVec, IntCounterVec, IntGauge, IntGaugeVec, UIntGauge, UIntGaugeVec,
 };
 use once_cell::sync::Lazy;
@@ -445,15 +445,6 @@ pub(crate) static WAIT_LSN_TIME: Lazy<Histogram> = Lazy::new(|| {
    .expect("failed to define a metric")
 });

-static FLUSH_WAIT_UPLOAD_TIME: Lazy<GaugeVec> = Lazy::new(|| {
-    register_gauge_vec!(
-        "pageserver_flush_wait_upload_seconds",
-        "Time spent waiting for preceding uploads during layer flush",
-        &["tenant_id", "shard_id", "timeline_id"]
-    )
-    .expect("failed to define a metric")
-});
-
 static LAST_RECORD_LSN: Lazy<IntGaugeVec> = Lazy::new(|| {
    register_int_gauge_vec!(
        "pageserver_last_record_lsn",
@@ -1854,7 +1845,6 @@ pub(crate) static LIVE_CONNECTIONS: Lazy<IntCounterPairVec> = Lazy::new(|| {

 #[derive(Clone, Copy, enum_map::Enum, IntoStaticStr)]
 pub(crate) enum ComputeCommandKind {
-    PageStreamV3,
    PageStreamV2,
    Basebackup,
    Fullbackup,
@@ -2338,15 +2328,13 @@ macro_rules! redo_bytes_histogram_count_buckets {
 pub(crate) struct WalIngestMetrics {
    pub(crate) bytes_received: IntCounter,
    pub(crate) records_received: IntCounter,
-    pub(crate) records_observed: IntCounter,
    pub(crate) records_committed: IntCounter,
    pub(crate) records_filtered: IntCounter,
    pub(crate) gap_blocks_zeroed_on_rel_extend: IntCounter,
    pub(crate) clear_vm_bits_unknown: IntCounterVec,
 }

-pub(crate) static WAL_INGEST: Lazy<WalIngestMetrics> = Lazy::new(|| {
-    WalIngestMetrics {
+pub(crate) static WAL_INGEST: Lazy<WalIngestMetrics> = Lazy::new(|| WalIngestMetrics {
    bytes_received: register_int_counter!(
        "pageserver_wal_ingest_bytes_received",
        "Bytes of WAL ingested from safekeepers",
@@ -2357,11 +2345,6 @@ pub(crate) static WAL_INGEST: Lazy<WalIngestMetrics> = Lazy::new(|| {
        "Number of WAL records received from safekeepers"
    )
    .expect("failed to define a metric"),
-    records_observed: register_int_counter!(
-        "pageserver_wal_ingest_records_observed",
-        "Number of WAL records observed from safekeepers. These are metadata only records for shard 0."
-    )
-    .expect("failed to define a metric"),
    records_committed: register_int_counter!(
        "pageserver_wal_ingest_records_committed",
        "Number of WAL records which resulted in writes to pageserver storage"
@@ -2383,7 +2366,6 @@ pub(crate) static WAL_INGEST: Lazy<WalIngestMetrics> = Lazy::new(|| {
        &["entity"],
    )
    .expect("failed to define a metric"),
-}
 });

 pub(crate) static PAGESERVER_TIMELINE_WAL_RECORDS_RECEIVED: Lazy<IntCounterVec> = Lazy::new(|| {
@@ -2595,7 +2577,6 @@ pub(crate) struct TimelineMetrics {
    shard_id: String,
    timeline_id: String,
    pub flush_time_histo: StorageTimeMetrics,
-    pub flush_wait_upload_time_gauge: Gauge,
    pub compact_time_histo: StorageTimeMetrics,
    pub create_images_time_histo: StorageTimeMetrics,
    pub logical_size_histo: StorageTimeMetrics,
@@ -2641,9 +2622,6 @@ impl TimelineMetrics {
            &shard_id,
            &timeline_id,
        );
-        let flush_wait_upload_time_gauge = FLUSH_WAIT_UPLOAD_TIME
-            .get_metric_with_label_values(&[&tenant_id, &shard_id, &timeline_id])
-            .unwrap();
        let compact_time_histo = StorageTimeMetrics::new(
            StorageTimeOperation::Compact,
            &tenant_id,
@@ -2789,7 +2767,6 @@ impl TimelineMetrics {
            shard_id,
            timeline_id,
            flush_time_histo,
-            flush_wait_upload_time_gauge,
            compact_time_histo,
            create_images_time_histo,
            logical_size_histo,
@@ -2839,14 +2816,6 @@ impl TimelineMetrics {
        self.resident_physical_size_gauge.get()
    }

-    pub(crate) fn flush_wait_upload_time_gauge_add(&self, duration: f64) {
-        self.flush_wait_upload_time_gauge.add(duration);
-        crate::metrics::FLUSH_WAIT_UPLOAD_TIME
-            .get_metric_with_label_values(&[&self.tenant_id, &self.shard_id, &self.timeline_id])
-            .unwrap()
-            .add(duration);
-    }
-
    pub(crate) fn shutdown(&self) {
        let was_shutdown = self
            .shutdown
@@ -2864,7 +2833,6 @@ impl TimelineMetrics {
        let shard_id = &self.shard_id;
        let _ = LAST_RECORD_LSN.remove_label_values(&[tenant_id, shard_id, timeline_id]);
        let _ = DISK_CONSISTENT_LSN.remove_label_values(&[tenant_id, shard_id, timeline_id]);
-        let _ = FLUSH_WAIT_UPLOAD_TIME.remove_label_values(&[tenant_id, shard_id, timeline_id]);
        let _ = STANDBY_HORIZON.remove_label_values(&[tenant_id, shard_id, timeline_id]);
        {
            RESIDENT_PHYSICAL_SIZE_GLOBAL.sub(self.resident_physical_size_get());
--- a/pageserver/src/page_service.rs
+++ b/pageserver/src/page_service.rs
@@ -17,7 +17,7 @@ use pageserver_api::models::{
    PagestreamErrorResponse, PagestreamExistsRequest, PagestreamExistsResponse,
    PagestreamFeMessage, PagestreamGetPageRequest, PagestreamGetSlruSegmentRequest,
    PagestreamGetSlruSegmentResponse, PagestreamNblocksRequest, PagestreamNblocksResponse,
-    PagestreamProtocolVersion, PagestreamRequest,
+    PagestreamProtocolVersion,
 };
 use pageserver_api::shard::TenantShardId;
 use postgres_backend::{
@@ -67,7 +67,7 @@ use crate::tenant::PageReconstructError;
 use crate::tenant::Timeline;
 use crate::{basebackup, timed_after_cancellation};
 use pageserver_api::key::rel_block_to_key;
-use pageserver_api::reltag::SlruKind;
+use pageserver_api::reltag::{BlockNumber, RelTag, SlruKind};
 use postgres_ffi::pg_constants::DEFAULTTABLESPACE_OID;
 use postgres_ffi::BLCKSZ;

@@ -537,23 +537,6 @@ impl From<WaitLsnError> for QueryError {
    }
 }

-#[derive(thiserror::Error, Debug)]
-struct BatchedPageStreamError {
-    req: PagestreamRequest,
-    err: PageStreamError,
-}
-
-impl std::fmt::Display for BatchedPageStreamError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        self.err.fmt(f)
-    }
-}
-
-struct BatchedGetPageRequest {
-    req: PagestreamGetPageRequest,
-    timer: SmgrOpTimer,
-}
-
 enum BatchedFeMessage {
    Exists {
        span: Span,
@@ -571,7 +554,7 @@ enum BatchedFeMessage {
        span: Span,
        shard: timeline::handle::Handle<TenantManagerTypes>,
        effective_request_lsn: Lsn,
-        pages: smallvec::SmallVec<[BatchedGetPageRequest; 1]>,
+        pages: smallvec::SmallVec<[(RelTag, BlockNumber, SmgrOpTimer); 1]>,
    },
    DbSize {
        span: Span,
@@ -587,7 +570,7 @@ enum BatchedFeMessage {
    },
    RespondError {
        span: Span,
-        error: BatchedPageStreamError,
+        error: PageStreamError,
    },
 }

@@ -612,15 +595,12 @@ impl BatchedFeMessage {
            BatchedFeMessage::GetPage { shard, pages, .. } => (
                shard,
                pages.len(),
-                itertools::Either::Right(pages.iter_mut().map(|p| &mut p.timer)),
+                itertools::Either::Right(pages.iter_mut().map(|(_, _, timer)| timer)),
            ),
            BatchedFeMessage::RespondError { .. } => return Ok(()),
        };
        let throttled = tokio::select! {
            throttled = shard.pagestream_throttle.throttle(tokens) => { throttled }
-            _ = shard.cancel.cancelled() => {
-                return Err(QueryError::Shutdown);
-            }
            _ = cancel.cancelled() => {
                return Err(QueryError::Shutdown);
            }
@@ -674,7 +654,6 @@ impl PageServerHandler {
        )
    }

-    #[allow(clippy::too_many_arguments)]
    async fn pagestream_read_message<IO>(
        pgb: &mut PostgresBackendReader<IO>,
        tenant_id: TenantId,
@@ -682,7 +661,6 @@ impl PageServerHandler {
        timeline_handles: &mut TimelineHandles,
        cancel: &CancellationToken,
        ctx: &RequestContext,
-        protocol_version: PagestreamProtocolVersion,
        parent_span: Span,
    ) -> Result<Option<BatchedFeMessage>, QueryError>
    where
@@ -717,12 +695,11 @@ impl PageServerHandler {
        fail::fail_point!("ps::handle-pagerequest-message");

        // parse request
-        let neon_fe_msg =
-            PagestreamFeMessage::parse(&mut copy_data_bytes.reader(), protocol_version)?;
+        let neon_fe_msg = PagestreamFeMessage::parse(&mut copy_data_bytes.reader())?;

        let batched_msg = match neon_fe_msg {
            PagestreamFeMessage::Exists(req) => {
-                let span = tracing::info_span!(parent: parent_span, "handle_get_rel_exists_request", rel = %req.rel, req_lsn = %req.hdr.request_lsn);
+                let span = tracing::info_span!(parent: parent_span, "handle_get_rel_exists_request", rel = %req.rel, req_lsn = %req.request_lsn);
                let shard = timeline_handles
                    .get(tenant_id, timeline_id, ShardSelector::Zero)
                    .instrument(span.clone()) // sets `shard_id` field
@@ -738,7 +715,7 @@ impl PageServerHandler {
                }
            }
            PagestreamFeMessage::Nblocks(req) => {
-                let span = tracing::info_span!(parent: parent_span, "handle_get_nblocks_request", rel = %req.rel, req_lsn = %req.hdr.request_lsn);
+                let span = tracing::info_span!(parent: parent_span, "handle_get_nblocks_request", rel = %req.rel, req_lsn = %req.request_lsn);
                let shard = timeline_handles
                    .get(tenant_id, timeline_id, ShardSelector::Zero)
                    .instrument(span.clone()) // sets `shard_id` field
@@ -754,7 +731,7 @@ impl PageServerHandler {
                }
            }
            PagestreamFeMessage::DbSize(req) => {
-                let span = tracing::info_span!(parent: parent_span, "handle_db_size_request", dbnode = %req.dbnode, req_lsn = %req.hdr.request_lsn);
+                let span = tracing::info_span!(parent: parent_span, "handle_db_size_request", dbnode = %req.dbnode, req_lsn = %req.request_lsn);
                let shard = timeline_handles
                    .get(tenant_id, timeline_id, ShardSelector::Zero)
                    .instrument(span.clone()) // sets `shard_id` field
@@ -770,7 +747,7 @@ impl PageServerHandler {
                }
            }
            PagestreamFeMessage::GetSlruSegment(req) => {
-                let span = tracing::info_span!(parent: parent_span, "handle_get_slru_segment_request", kind = %req.kind, segno = %req.segno, req_lsn = %req.hdr.request_lsn);
+                let span = tracing::info_span!(parent: parent_span, "handle_get_slru_segment_request", kind = %req.kind, segno = %req.segno, req_lsn = %req.request_lsn);
                let shard = timeline_handles
                    .get(tenant_id, timeline_id, ShardSelector::Zero)
                    .instrument(span.clone()) // sets `shard_id` field
@@ -785,23 +762,25 @@ impl PageServerHandler {
                    req,
                }
            }
-            PagestreamFeMessage::GetPage(req) => {
-                let span = tracing::info_span!(parent: parent_span, "handle_get_page_at_lsn_request_batched", req_lsn = %req.hdr.request_lsn);
+            PagestreamFeMessage::GetPage(PagestreamGetPageRequest {
+                request_lsn,
+                not_modified_since,
+                rel,
+                blkno,
+            }) => {
+                let span = tracing::info_span!(parent: parent_span, "handle_get_page_at_lsn_request_batched", req_lsn = %request_lsn);

                macro_rules! respond_error {
                    ($error:expr) => {{
                        let error = BatchedFeMessage::RespondError {
                            span,
-                            error: BatchedPageStreamError {
-                                req: req.hdr,
-                                err: $error,
-                            },
+                            error: $error,
                        };
                        Ok(Some(error))
                    }};
                }

-                let key = rel_block_to_key(req.rel, req.blkno);
+                let key = rel_block_to_key(rel, blkno);
                let shard = match timeline_handles
                    .get(tenant_id, timeline_id, ShardSelector::Page(key))
                    .instrument(span.clone()) // sets `shard_id` field
@@ -835,8 +814,8 @@ impl PageServerHandler {

                let effective_request_lsn = match Self::wait_or_get_last_lsn(
                    &shard,
-                    req.hdr.request_lsn,
-                    req.hdr.not_modified_since,
+                    request_lsn,
+                    not_modified_since,
                    &shard.get_latest_gc_cutoff_lsn(),
                    ctx,
                )
@@ -852,7 +831,7 @@ impl PageServerHandler {
                    span,
                    shard,
                    effective_request_lsn,
-                    pages: smallvec::smallvec![BatchedGetPageRequest { req, timer }],
+                    pages: smallvec::smallvec![(rel, blkno, timer)],
                }
            }
        };
@@ -931,7 +910,6 @@ impl PageServerHandler {
        pgb_writer: &mut PostgresBackend<IO>,
        batch: BatchedFeMessage,
        cancel: &CancellationToken,
-        protocol_version: PagestreamProtocolVersion,
        ctx: &RequestContext,
    ) -> Result<(), QueryError>
    where
@@ -939,7 +917,7 @@ impl PageServerHandler {
    {
        // invoke handler function
        let (handler_results, span): (
-            Vec<Result<(PagestreamBeMessage, SmgrOpTimer), BatchedPageStreamError>>,
+            Vec<Result<(PagestreamBeMessage, SmgrOpTimer), PageStreamError>>,
            _,
        ) = match batch {
            BatchedFeMessage::Exists {
@@ -954,8 +932,7 @@ impl PageServerHandler {
                        .handle_get_rel_exists_request(&shard, &req, ctx)
                        .instrument(span.clone())
                        .await
-                        .map(|msg| (msg, timer))
-                        .map_err(|err| BatchedPageStreamError { err, req: req.hdr })],
+                        .map(|msg| (msg, timer))],
                    span,
                )
            }
@@ -971,8 +948,7 @@ impl PageServerHandler {
                        .handle_get_nblocks_request(&shard, &req, ctx)
                        .instrument(span.clone())
                        .await
-                        .map(|msg| (msg, timer))
-                        .map_err(|err| BatchedPageStreamError { err, req: req.hdr })],
+                        .map(|msg| (msg, timer))],
                    span,
                )
            }
@@ -1014,8 +990,7 @@ impl PageServerHandler {
                        .handle_db_size_request(&shard, &req, ctx)
                        .instrument(span.clone())
                        .await
-                        .map(|msg| (msg, timer))
-                        .map_err(|err| BatchedPageStreamError { err, req: req.hdr })],
+                        .map(|msg| (msg, timer))],
                    span,
                )
            }
@@ -1031,8 +1006,7 @@ impl PageServerHandler {
                        .handle_get_slru_segment_request(&shard, &req, ctx)
                        .instrument(span.clone())
                        .await
-                        .map(|msg| (msg, timer))
-                        .map_err(|err| BatchedPageStreamError { err, req: req.hdr })],
+                        .map(|msg| (msg, timer))],
                    span,
                )
            }
@@ -1048,7 +1022,7 @@ impl PageServerHandler {
        // Other handler errors are sent back as an error message and we stay in pagestream protocol.
        for handler_result in handler_results {
            let (response_msg, timer) = match handler_result {
-                Err(e) => match &e.err {
+                Err(e) => match &e {
                    PageStreamError::Shutdown => {
                        // If we fail to fulfil a request during shutdown, which may be _because_ of
                        // shutdown, then do not send the error to the client.  Instead just drop the
@@ -1067,14 +1041,13 @@ impl PageServerHandler {
                        // print the all details to the log with {:#}, but for the client the
                        // error message is enough.  Do not log if shutting down, as the anyhow::Error
                        // here includes cancellation which is not an error.
-                        let full = utils::error::report_compact_sources(&e.err);
+                        let full = utils::error::report_compact_sources(&e);
                        span.in_scope(|| {
                            error!("error reading relation or page version: {full:#}")
                        });
                        (
                            PagestreamBeMessage::Error(PagestreamErrorResponse {
-                                req: e.req,
-                                message: e.err.to_string(),
+                                message: e.to_string(),
                            }),
                            None, // TODO: measure errors
                        )
@@ -1087,9 +1060,7 @@ impl PageServerHandler {
            // marshal & transmit response message
            //

-            pgb_writer.write_message_noflush(&BeMessage::CopyData(
-                &response_msg.serialize(protocol_version),
-            ))?;
+            pgb_writer.write_message_noflush(&BeMessage::CopyData(&response_msg.serialize()))?;

            // We purposefully don't count flush time into the timer.
            //
@@ -1152,7 +1123,7 @@ impl PageServerHandler {
        pgb: &mut PostgresBackend<IO>,
        tenant_id: TenantId,
        timeline_id: TimelineId,
-        protocol_version: PagestreamProtocolVersion,
+        _protocol_version: PagestreamProtocolVersion,
        ctx: RequestContext,
    ) -> Result<(), QueryError>
    where
@@ -1192,7 +1163,6 @@ impl PageServerHandler {
                    timeline_handles,
                    request_span,
                    pipelining_config,
-                    protocol_version,
                    &ctx,
                )
                .await
@@ -1205,7 +1175,6 @@ impl PageServerHandler {
                    timeline_id,
                    timeline_handles,
                    request_span,
-                    protocol_version,
                    &ctx,
                )
                .await
@@ -1232,7 +1201,6 @@ impl PageServerHandler {
        timeline_id: TimelineId,
        mut timeline_handles: TimelineHandles,
        request_span: Span,
-        protocol_version: PagestreamProtocolVersion,
        ctx: &RequestContext,
    ) -> (
        (PostgresBackendReader<IO>, TimelineHandles),
@@ -1250,7 +1218,6 @@ impl PageServerHandler {
                &mut timeline_handles,
                &cancel,
                ctx,
-                protocol_version,
                request_span.clone(),
            )
            .await;
@@ -1271,7 +1238,7 @@ impl PageServerHandler {
            }

            let err = self
-                .pagesteam_handle_batched_message(pgb_writer, msg, &cancel, protocol_version, ctx)
+                .pagesteam_handle_batched_message(pgb_writer, msg, &cancel, ctx)
                .await;
            match err {
                Ok(()) => {}
@@ -1294,7 +1261,6 @@ impl PageServerHandler {
        mut timeline_handles: TimelineHandles,
        request_span: Span,
        pipelining_config: PageServicePipeliningConfigPipelined,
-        protocol_version: PagestreamProtocolVersion,
        ctx: &RequestContext,
    ) -> (
        (PostgresBackendReader<IO>, TimelineHandles),
@@ -1392,7 +1358,6 @@ impl PageServerHandler {
                        &mut timeline_handles,
                        &cancel_batcher,
                        &ctx,
-                        protocol_version,
                        request_span.clone(),
                    )
                    .await;
@@ -1438,14 +1403,8 @@ impl PageServerHandler {
                    batch
                        .throttle_and_record_start_processing(&self.cancel)
                        .await?;
-                    self.pagesteam_handle_batched_message(
-                        pgb_writer,
-                        batch,
-                        &cancel,
-                        protocol_version,
-                        &ctx,
-                    )
-                    .await?;
+                    self.pagesteam_handle_batched_message(pgb_writer, batch, &cancel, &ctx)
+                        .await?;
                }
            }
        });
@@ -1619,8 +1578,8 @@ impl PageServerHandler {
        let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn();
        let lsn = Self::wait_or_get_last_lsn(
            timeline,
-            req.hdr.request_lsn,
-            req.hdr.not_modified_since,
+            req.request_lsn,
+            req.not_modified_since,
            &latest_gc_cutoff_lsn,
            ctx,
        )
@@ -1631,7 +1590,6 @@ impl PageServerHandler {
            .await?;

        Ok(PagestreamBeMessage::Exists(PagestreamExistsResponse {
-            req: *req,
            exists,
        }))
    }
@@ -1646,8 +1604,8 @@ impl PageServerHandler {
        let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn();
        let lsn = Self::wait_or_get_last_lsn(
            timeline,
-            req.hdr.request_lsn,
-            req.hdr.not_modified_since,
+            req.request_lsn,
+            req.not_modified_since,
            &latest_gc_cutoff_lsn,
            ctx,
        )
@@ -1658,7 +1616,6 @@ impl PageServerHandler {
            .await?;

        Ok(PagestreamBeMessage::Nblocks(PagestreamNblocksResponse {
-            req: *req,
            n_blocks,
        }))
    }
@@ -1673,8 +1630,8 @@ impl PageServerHandler {
        let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn();
        let lsn = Self::wait_or_get_last_lsn(
            timeline,
-            req.hdr.request_lsn,
-            req.hdr.not_modified_since,
+            req.request_lsn,
+            req.not_modified_since,
            &latest_gc_cutoff_lsn,
            ctx,
        )
@@ -1686,7 +1643,6 @@ impl PageServerHandler {
        let db_size = total_blocks as i64 * BLCKSZ as i64;

        Ok(PagestreamBeMessage::DbSize(PagestreamDbSizeResponse {
-            req: *req,
            db_size,
        }))
    }
@@ -1696,9 +1652,9 @@ impl PageServerHandler {
        &mut self,
        timeline: &Timeline,
        effective_lsn: Lsn,
-        requests: smallvec::SmallVec<[BatchedGetPageRequest; 1]>,
+        requests: smallvec::SmallVec<[(RelTag, BlockNumber, SmgrOpTimer); 1]>,
        ctx: &RequestContext,
-    ) -> Vec<Result<(PagestreamBeMessage, SmgrOpTimer), BatchedPageStreamError>> {
+    ) -> Vec<Result<(PagestreamBeMessage, SmgrOpTimer), PageStreamError>> {
        debug_assert_current_span_has_tenant_and_timeline_id();

        timeline
@@ -1707,7 +1663,7 @@ impl PageServerHandler {

        let results = timeline
            .get_rel_page_at_lsn_batched(
-                requests.iter().map(|p| (&p.req.rel, &p.req.blkno)),
+                requests.iter().map(|(reltag, blkno, _)| (reltag, blkno)),
                effective_lsn,
                ctx,
            )
@@ -1719,20 +1675,16 @@ impl PageServerHandler {
            requests
                .into_iter()
                .zip(results.into_iter())
-                .map(|(req, res)| {
+                .map(|((_, _, timer), res)| {
                    res.map(|page| {
                        (
                            PagestreamBeMessage::GetPage(models::PagestreamGetPageResponse {
-                                req: req.req,
                                page,
                            }),
-                            req.timer,
+                            timer,
                        )
                    })
-                    .map_err(|e| BatchedPageStreamError {
-                        err: PageStreamError::from(e),
-                        req: req.req.hdr,
-                    })
+                    .map_err(PageStreamError::from)
                }),
        )
    }
@@ -1747,8 +1699,8 @@ impl PageServerHandler {
        let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn();
        let lsn = Self::wait_or_get_last_lsn(
            timeline,
-            req.hdr.request_lsn,
-            req.hdr.not_modified_since,
+            req.request_lsn,
+            req.not_modified_since,
            &latest_gc_cutoff_lsn,
            ctx,
        )
@@ -1759,7 +1711,7 @@ impl PageServerHandler {
        let segment = timeline.get_slru_segment(kind, req.segno, lsn, ctx).await?;

        Ok(PagestreamBeMessage::GetSlruSegment(
-            PagestreamGetSlruSegmentResponse { req: *req, segment },
+            PagestreamGetSlruSegmentResponse { segment },
        ))
    }

@@ -1954,7 +1906,6 @@ struct FullBackupCmd {
 struct PageStreamCmd {
    tenant_id: TenantId,
    timeline_id: TimelineId,
-    protocol_version: PagestreamProtocolVersion,
 }

 /// `lease lsn tenant timeline lsn`
@@ -1975,7 +1926,7 @@ enum PageServiceCmd {
 }

 impl PageStreamCmd {
-    fn parse(query: &str, protocol_version: PagestreamProtocolVersion) -> anyhow::Result<Self> {
+    fn parse(query: &str) -> anyhow::Result<Self> {
        let parameters = query.split_whitespace().collect_vec();
        if parameters.len() != 2 {
            bail!(
@@ -1990,7 +1941,6 @@ impl PageStreamCmd {
        Ok(Self {
            tenant_id,
            timeline_id,
-            protocol_version,
        })
    }
 }
@@ -2128,14 +2078,7 @@ impl PageServiceCmd {
            bail!("cannot parse query: {query}")
        };
        match cmd.to_ascii_lowercase().as_str() {
-            "pagestream_v2" => Ok(Self::PageStream(PageStreamCmd::parse(
-                other,
-                PagestreamProtocolVersion::V2,
-            )?)),
-            "pagestream_v3" => Ok(Self::PageStream(PageStreamCmd::parse(
-                other,
-                PagestreamProtocolVersion::V3,
-            )?)),
+            "pagestream_v2" => Ok(Self::PageStream(PageStreamCmd::parse(other)?)),
            "basebackup" => Ok(Self::BaseBackup(BaseBackupCmd::parse(other)?)),
            "fullbackup" => Ok(Self::FullBackup(FullBackupCmd::parse(other)?)),
            "lease" => {
@@ -2217,21 +2160,25 @@ where
            PageServiceCmd::PageStream(PageStreamCmd {
                tenant_id,
                timeline_id,
-                protocol_version,
            }) => {
                tracing::Span::current()
                    .record("tenant_id", field::display(tenant_id))
                    .record("timeline_id", field::display(timeline_id));

                self.check_permission(Some(tenant_id))?;
-                let command_kind = match protocol_version {
-                    PagestreamProtocolVersion::V2 => ComputeCommandKind::PageStreamV2,
-                    PagestreamProtocolVersion::V3 => ComputeCommandKind::PageStreamV3,
-                };
-                COMPUTE_COMMANDS_COUNTERS.for_command(command_kind).inc();

-                self.handle_pagerequests(pgb, tenant_id, timeline_id, protocol_version, ctx)
-                    .await?;
+                COMPUTE_COMMANDS_COUNTERS
+                    .for_command(ComputeCommandKind::PageStreamV2)
+                    .inc();
+
+                self.handle_pagerequests(
+                    pgb,
+                    tenant_id,
+                    timeline_id,
+                    PagestreamProtocolVersion::V2,
+                    ctx,
+                )
+                .await?;
            }
            PageServiceCmd::BaseBackup(BaseBackupCmd {
                tenant_id,
@@ -2410,8 +2357,7 @@ mod tests {
            cmd,
            PageServiceCmd::PageStream(PageStreamCmd {
                tenant_id,
-                timeline_id,
-                protocol_version: PagestreamProtocolVersion::V2,
+                timeline_id
            })
        );
        let cmd = PageServiceCmd::parse(&format!("basebackup {tenant_id} {timeline_id}")).unwrap();
--- a/pageserver/src/pgdatadir_mapping.rs
+++ b/pageserver/src/pgdatadir_mapping.rs
@@ -627,7 +627,7 @@ impl Timeline {
            // cannot overflow, high and low are both smaller than u64::MAX / 2
            let mid = (high + low) / 2;

-            let cmp = match self
+            let cmp = self
                .is_latest_commit_timestamp_ge_than(
                    search_timestamp,
                    Lsn(mid * 8),
@@ -635,16 +635,7 @@ impl Timeline {
                    &mut found_larger,
                    ctx,
                )
-                .await
-            {
-                Ok(res) => res,
-                Err(PageReconstructError::MissingKey(e)) => {
-                    warn!("Missing key while find_lsn_for_timestamp. Either we might have already garbage-collected that data or the key is really missing. Last error: {:#}", e);
-                    // Return that we didn't find any requests smaller than the LSN, and logging the error.
-                    return Ok(LsnForTimestamp::Past(min_lsn));
-                }
-                Err(e) => return Err(e),
-            };
+                .await?;

            if cmp {
                high = mid;
@@ -652,7 +643,6 @@ impl Timeline {
                low = mid + 1;
            }
        }
-
        // If `found_smaller == true`, `low = t + 1` where `t` is the target LSN,
        // so the LSN of the last commit record before or at `search_timestamp`.
        // Remove one from `low` to get `t`.
--- a/pageserver/src/tenant.rs
+++ b/pageserver/src/tenant.rs
@@ -48,7 +48,6 @@ use timeline::compaction::GcCompactJob;
 use timeline::compaction::ScheduledCompactionTask;
 use timeline::import_pgdata;
 use timeline::offload::offload_timeline;
-use timeline::offload::OffloadError;
 use timeline::CompactFlags;
 use timeline::CompactOptions;
 use timeline::CompactionError;
@@ -2040,7 +2039,7 @@ impl Tenant {
    ) -> Result<Arc<Timeline>, TimelineArchivalError> {
        info!("unoffloading timeline");

-        // We activate the timeline below manually, so this must be called on an active tenant.
+        // We activate the timeline below manually, so this must be called on an active timeline.
        // We expect callers of this function to ensure this.
        match self.current_state() {
            TenantState::Activating { .. }
@@ -2605,15 +2604,9 @@ impl Tenant {
                WaitCompletionError::NotInitialized(
                    e, // If the queue is already stopped, it's a shutdown error.
                ) if e.is_stopping() => CreateTimelineError::ShuttingDown,
-                WaitCompletionError::NotInitialized(_) => {
-                    // This is a bug: we should never try to wait for uploads before initializing the timeline
-                    debug_assert!(false);
-                    CreateTimelineError::Other(anyhow::anyhow!("timeline not initialized"))
-                }
-                WaitCompletionError::UploadQueueShutDownOrStopped => {
-                    CreateTimelineError::ShuttingDown
-                }
-            })?;
+                e => CreateTimelineError::Other(e.into()),
+            })
+            .context("wait for timeline initial uploads to complete")?;

        // The creating task is responsible for activating the timeline.
        // We do this after `wait_completion()` so that we don't spin up tasks that start
@@ -3101,17 +3094,9 @@ impl Tenant {
            };
            has_pending_task |= pending_task_left.unwrap_or(false);
            if pending_task_left == Some(false) && *can_offload {
-                pausable_failpoint!("before-timeline-auto-offload");
-                match offload_timeline(self, timeline)
+                offload_timeline(self, timeline)
                    .instrument(info_span!("offload_timeline", %timeline_id))
-                    .await
-                {
-                    Err(OffloadError::NotArchived) => {
-                        // Ignore this, we likely raced with unarchival
-                        Ok(())
-                    }
-                    other => other,
-                }?;
+                    .await?;
            }
        }

@@ -4497,17 +4482,13 @@ impl Tenant {
        let mut gc_cutoffs: HashMap<TimelineId, GcCutoffs> =
            HashMap::with_capacity(timelines.len());

-        // Ensures all timelines use the same start time when computing the time cutoff.
-        let now_ts_for_pitr_calc = SystemTime::now();
        for timeline in timelines.iter() {
            let cutoff = timeline
                .get_last_record_lsn()
                .checked_sub(horizon)
                .unwrap_or(Lsn(0));

-            let cutoffs = timeline
-                .find_gc_cutoffs(now_ts_for_pitr_calc, cutoff, pitr, cancel, ctx)
-                .await?;
+            let cutoffs = timeline.find_gc_cutoffs(cutoff, pitr, cancel, ctx).await?;
            let old = gc_cutoffs.insert(timeline.timeline_id, cutoffs);
            assert!(old.is_none());
        }
--- a/pageserver/src/tenant/remote_timeline_client.rs
+++ b/pageserver/src/tenant/remote_timeline_client.rs
@@ -304,15 +304,6 @@ pub enum WaitCompletionError {
 #[derive(Debug, thiserror::Error)]
 #[error("Upload queue either in unexpected state or hasn't downloaded manifest yet")]
 pub struct UploadQueueNotReadyError;
-
-#[derive(Debug, thiserror::Error)]
-pub enum ShutdownIfArchivedError {
-    #[error(transparent)]
-    NotInitialized(NotInitialized),
-    #[error("timeline is not archived")]
-    NotArchived,
-}
-
 /// Behavioral modes that enable seamless live migration.
 ///
 /// See docs/rfcs/028-pageserver-migration.md to understand how these fit in.
@@ -825,55 +816,6 @@ impl RemoteTimelineClient {
        Ok(need_wait)
    }

-    /// Shuts the timeline client down, but only if the timeline is archived.
-    ///
-    /// This function and [`Self::schedule_index_upload_for_timeline_archival_state`] use the
-    /// same lock to prevent races between unarchival and offloading: unarchival requires the
-    /// upload queue to be initialized, and leaves behind an upload queue where either dirty
-    /// or clean has archived_at of `None`. offloading leaves behind an uninitialized upload
-    /// queue.
-    pub(crate) async fn shutdown_if_archived(
-        self: &Arc<Self>,
-    ) -> Result<(), ShutdownIfArchivedError> {
-        {
-            let mut guard = self.upload_queue.lock().unwrap();
-            let upload_queue = guard
-                .initialized_mut()
-                .map_err(ShutdownIfArchivedError::NotInitialized)?;
-
-            match (
-                upload_queue.dirty.archived_at.is_none(),
-                upload_queue.clean.0.archived_at.is_none(),
-            ) {
-                // The expected case: the timeline is archived and we don't want to unarchive
-                (false, false) => {}
-                (true, false) => {
-                    tracing::info!("can't shut down timeline: timeline slated for unarchival");
-                    return Err(ShutdownIfArchivedError::NotArchived);
-                }
-                (dirty_archived, true) => {
-                    tracing::info!(%dirty_archived, "can't shut down timeline: timeline not archived in remote storage");
-                    return Err(ShutdownIfArchivedError::NotArchived);
-                }
-            }
-
-            // Set the shutting_down flag while the guard from the archival check is held.
-            // This prevents a race with unarchival, as initialized_mut will not return
-            // an upload queue from this point.
-            // Also launch the queued tasks like shutdown() does.
-            if !upload_queue.shutting_down {
-                upload_queue.shutting_down = true;
-                upload_queue.queued_operations.push_back(UploadOp::Shutdown);
-                // this operation is not counted similar to Barrier
-                self.launch_queued_tasks(upload_queue);
-            }
-        }
-
-        self.shutdown().await;
-
-        Ok(())
-    }
-
    /// Launch an index-file upload operation in the background, setting `import_pgdata` field.
    pub(crate) fn schedule_index_upload_for_import_pgdata_state_update(
        self: &Arc<Self>,
@@ -2001,30 +1943,6 @@ impl RemoteTimelineClient {
                return;
            }

-            // Assert that we don't modify a layer that's referenced by the current index.
-            if cfg!(debug_assertions) {
-                let modified = match &task.op {
-                    UploadOp::UploadLayer(layer, layer_metadata, _) => {
-                        vec![(layer.layer_desc().layer_name(), layer_metadata)]
-                    }
-                    UploadOp::Delete(delete) => {
-                        delete.layers.iter().map(|(n, m)| (n.clone(), m)).collect()
-                    }
-                    // These don't modify layers.
-                    UploadOp::UploadMetadata { .. } => Vec::new(),
-                    UploadOp::Barrier(_) => Vec::new(),
-                    UploadOp::Shutdown => Vec::new(),
-                };
-                if let Ok(queue) = self.upload_queue.lock().unwrap().initialized_mut() {
-                    for (ref name, metadata) in modified {
-                        debug_assert!(
-                            !queue.clean.0.references(name, metadata),
-                            "layer {name} modified while referenced by index",
-                        );
-                    }
-                }
-            }
-
            let upload_result: anyhow::Result<()> = match &task.op {
                UploadOp::UploadLayer(ref layer, ref layer_metadata, mode) => {
                    if let Some(OpType::FlushDeletion) = mode {
@@ -2591,21 +2509,6 @@ pub fn remote_layer_path(
    RemotePath::from_string(&path).expect("Failed to construct path")
 }

-/// Returns true if a and b have the same layer path within a tenant/timeline. This is essentially
-/// remote_layer_path(a) == remote_layer_path(b) without the string allocations.
-///
-/// TODO: there should be a variant of LayerName for the physical path that contains information
-/// about the shard and generation, such that this could be replaced by a simple comparison.
-pub fn is_same_remote_layer_path(
-    aname: &LayerName,
-    ameta: &LayerFileMetadata,
-    bname: &LayerName,
-    bmeta: &LayerFileMetadata,
-) -> bool {
-    // NB: don't assert remote_layer_path(a) == remote_layer_path(b); too expensive even for debug.
-    aname == bname && ameta.shard == bmeta.shard && ameta.generation == bmeta.generation
-}
-
 pub fn remote_initdb_archive_path(tenant_id: &TenantId, timeline_id: &TimelineId) -> RemotePath {
    RemotePath::from_string(&format!(
        "tenants/{tenant_id}/{TIMELINES_SEGMENT_NAME}/{timeline_id}/{INITDB_PATH}"
--- a/pageserver/src/tenant/remote_timeline_client/index.rs
+++ b/pageserver/src/tenant/remote_timeline_client/index.rs
@@ -8,14 +8,14 @@ use std::collections::HashMap;
 use chrono::NaiveDateTime;
 use pageserver_api::models::AuxFilePolicy;
 use serde::{Deserialize, Serialize};
+use utils::id::TimelineId;

-use super::is_same_remote_layer_path;
 use crate::tenant::metadata::TimelineMetadata;
 use crate::tenant::storage_layer::LayerName;
 use crate::tenant::timeline::import_pgdata;
 use crate::tenant::Generation;
 use pageserver_api::shard::ShardIndex;
-use utils::id::TimelineId;
+
 use utils::lsn::Lsn;

 /// In-memory representation of an `index_part.json` file
@@ -45,8 +45,10 @@ pub struct IndexPart {
    #[serde(skip_serializing_if = "Option::is_none")]
    pub import_pgdata: Option<import_pgdata::index_part_format::Root>,

-    /// Layer filenames and metadata. For an index persisted in remote storage, all layers must
-    /// exist in remote storage.
+    /// Per layer file name metadata, which can be present for a present or missing layer file.
+    ///
+    /// Older versions of `IndexPart` will not have this property or have only a part of metadata
+    /// that latest version stores.
    pub layer_metadata: HashMap<LayerName, LayerFileMetadata>,

    /// Because of the trouble of eyeballing the legacy "metadata" field, we copied the
@@ -141,17 +143,6 @@ impl IndexPart {
    pub(crate) fn example() -> Self {
        Self::empty(TimelineMetadata::example())
    }
-
-    /// Returns true if the index contains a reference to the given layer (i.e. file path).
-    ///
-    /// TODO: there should be a variant of LayerName for the physical remote path that contains
-    /// information about the shard and generation, to avoid passing in metadata.
-    pub fn references(&self, name: &LayerName, metadata: &LayerFileMetadata) -> bool {
-        let Some(index_metadata) = self.layer_metadata.get(name) else {
-            return false;
-        };
-        is_same_remote_layer_path(name, metadata, name, index_metadata)
-    }
 }

 /// Metadata gathered for each of the layer files.
--- a/pageserver/src/tenant/timeline.rs
+++ b/pageserver/src/tenant/timeline.rs
@@ -144,19 +144,15 @@ use self::layer_manager::LayerManager;
 use self::logical_size::LogicalSize;
 use self::walreceiver::{WalReceiver, WalReceiverConf};

+use super::config::TenantConf;
+use super::remote_timeline_client::index::IndexPart;
+use super::remote_timeline_client::RemoteTimelineClient;
+use super::secondary::heatmap::{HeatMapLayer, HeatMapTimeline};
+use super::storage_layer::{LayerFringe, LayerVisibilityHint, ReadableLayer};
+use super::upload_queue::NotInitialized;
+use super::GcError;
 use super::{
-    config::TenantConf, storage_layer::LayerVisibilityHint, upload_queue::NotInitialized,
-    MaybeOffloaded,
-};
-use super::{debug_assert_current_span_has_tenant_and_timeline_id, AttachedTenantConf};
-use super::{remote_timeline_client::index::IndexPart, storage_layer::LayerFringe};
-use super::{
-    remote_timeline_client::RemoteTimelineClient, remote_timeline_client::WaitCompletionError,
-    storage_layer::ReadableLayer,
-};
-use super::{
-    secondary::heatmap::{HeatMapLayer, HeatMapTimeline},
-    GcError,
+    debug_assert_current_span_has_tenant_and_timeline_id, AttachedTenantConf, MaybeOffloaded,
 };

 #[cfg(test)]
@@ -3840,24 +3836,6 @@ impl Timeline {
            // release lock on 'layers'
        };

-        // Backpressure mechanism: wait with continuation of the flush loop until we have uploaded all layer files.
-        // This makes us refuse ingest until the new layers have been persisted to the remote
-        let start = Instant::now();
-        self.remote_client
-            .wait_completion()
-            .await
-            .map_err(|e| match e {
-                WaitCompletionError::UploadQueueShutDownOrStopped
-                | WaitCompletionError::NotInitialized(
-                    NotInitialized::ShuttingDown | NotInitialized::Stopped,
-                ) => FlushLayerError::Cancelled,
-                WaitCompletionError::NotInitialized(NotInitialized::Uninitialized) => {
-                    FlushLayerError::Other(anyhow!(e).into())
-                }
-            })?;
-        let duration = start.elapsed().as_secs_f64();
-        self.metrics.flush_wait_upload_time_gauge_add(duration);
-
        // FIXME: between create_delta_layer and the scheduling of the upload in `update_metadata_file`,
        // a compaction can delete the file and then it won't be available for uploads any more.
        // We still schedule the upload, resulting in an error, but ideally we'd somehow avoid this
@@ -4859,7 +4837,6 @@ impl Timeline {

    async fn find_gc_time_cutoff(
        &self,
-        now: SystemTime,
        pitr: Duration,
        cancel: &CancellationToken,
        ctx: &RequestContext,
@@ -4867,6 +4844,7 @@ impl Timeline {
        debug_assert_current_span_has_tenant_and_timeline_id();
        if self.shard_identity.is_shard_zero() {
            // Shard Zero has SLRU data and can calculate the PITR time -> LSN mapping itself
+            let now = SystemTime::now();
            let time_range = if pitr == Duration::ZERO {
                humantime::parse_duration(DEFAULT_PITR_INTERVAL).expect("constant is invalid")
            } else {
@@ -4952,7 +4930,6 @@ impl Timeline {
    #[instrument(skip_all, fields(timeline_id=%self.timeline_id))]
    pub(super) async fn find_gc_cutoffs(
        &self,
-        now: SystemTime,
        space_cutoff: Lsn,
        pitr: Duration,
        cancel: &CancellationToken,
@@ -4980,7 +4957,7 @@ impl Timeline {
        // - if PITR interval is set, then this is our cutoff.
        // - if PITR interval is not set, then we do a lookup
        //   based on DEFAULT_PITR_INTERVAL, so that size-based retention does not result in keeping history around permanently on idle databases.
-        let time_cutoff = self.find_gc_time_cutoff(now, pitr, cancel, ctx).await?;
+        let time_cutoff = self.find_gc_time_cutoff(pitr, cancel, ctx).await?;

        Ok(match (pitr, time_cutoff) {
            (Duration::ZERO, Some(time_cutoff)) => {
--- a/pageserver/src/tenant/timeline/compaction.rs
+++ b/pageserver/src/tenant/timeline/compaction.rs
@@ -1799,24 +1799,6 @@ impl Timeline {
        Ok(())
    }

-    /// Get a watermark for gc-compaction, that is the lowest LSN that we can use as the `gc_horizon` for
-    /// the compaction algorithm. It is min(space_cutoff, time_cutoff, latest_gc_cutoff, standby_horizon).
-    /// Leases and retain_lsns are considered in the gc-compaction job itself so we don't need to account for them
-    /// here.
-    pub(crate) fn get_gc_compaction_watermark(self: &Arc<Self>) -> Lsn {
-        let gc_cutoff_lsn = {
-            let gc_info = self.gc_info.read().unwrap();
-            gc_info.min_cutoff()
-        };
-
-        // TODO: standby horizon should use leases so we don't really need to consider it here.
-        // let watermark = watermark.min(self.standby_horizon.load());
-
-        // TODO: ensure the child branches will not use anything below the watermark, or consider
-        // them when computing the watermark.
-        gc_cutoff_lsn.min(*self.get_latest_gc_cutoff_lsn())
-    }
-
    /// Split a gc-compaction job into multiple compaction jobs. The split is based on the key range and the estimated size of the compaction job.
    /// The function returns a list of compaction jobs that can be executed separately. If the upper bound of the compact LSN
    /// range is not specified, we will use the latest gc_cutoff as the upper bound, so that all jobs in the jobset acts
@@ -1829,7 +1811,7 @@ impl Timeline {
        let compact_below_lsn = if job.compact_lsn_range.end != Lsn::MAX {
            job.compact_lsn_range.end
        } else {
-            self.get_gc_compaction_watermark()
+            *self.get_latest_gc_cutoff_lsn() // use the real gc cutoff
        };

        // Split compaction job to about 4GB each
@@ -2024,7 +2006,7 @@ impl Timeline {
                // Therefore, it can only clean up data that cannot be cleaned up with legacy gc, instead of
                // cleaning everything that theoritically it could. In the future, it should use `self.gc_info`
                // to get the truth data.
-                let real_gc_cutoff = self.get_gc_compaction_watermark();
+                let real_gc_cutoff = *self.get_latest_gc_cutoff_lsn();
                // The compaction algorithm will keep all keys above the gc_cutoff while keeping only necessary keys below the gc_cutoff for
                // each of the retain_lsn. Therefore, if the user-provided `compact_lsn_range.end` is larger than the real gc cutoff, we will use
                // the real cutoff.
--- a/pageserver/src/tenant/timeline/delete.rs
+++ b/pageserver/src/tenant/timeline/delete.rs
@@ -194,9 +194,7 @@ impl DeleteTimelineFlow {
        super::debug_assert_current_span_has_tenant_and_timeline_id();

        let allow_offloaded_children = false;
-        let set_stopping = true;
-        let (timeline, mut guard) =
-            Self::prepare(tenant, timeline_id, allow_offloaded_children, set_stopping)?;
+        let (timeline, mut guard) = Self::prepare(tenant, timeline_id, allow_offloaded_children)?;

        guard.mark_in_progress()?;

@@ -336,7 +334,6 @@ impl DeleteTimelineFlow {
        tenant: &Tenant,
        timeline_id: TimelineId,
        allow_offloaded_children: bool,
-        set_stopping: bool,
    ) -> Result<(TimelineOrOffloaded, DeletionGuard), DeleteTimelineError> {
        // Note the interaction between this guard and deletion guard.
        // Here we attempt to lock deletion guard when we're holding a lock on timelines.
@@ -392,10 +389,8 @@ impl DeleteTimelineFlow {
            }
        };

-        if set_stopping {
-            if let TimelineOrOffloaded::Timeline(timeline) = &timeline {
-                timeline.set_state(TimelineState::Stopping);
-            }
+        if let TimelineOrOffloaded::Timeline(timeline) = &timeline {
+            timeline.set_state(TimelineState::Stopping);
        }

        Ok((timeline, delete_lock_guard))
--- a/pageserver/src/tenant/timeline/offload.rs
+++ b/pageserver/src/tenant/timeline/offload.rs
@@ -1,11 +1,8 @@
 use std::sync::Arc;

-use pageserver_api::models::{TenantState, TimelineState};
-
 use super::delete::{delete_local_timeline_directory, DeleteTimelineFlow, DeletionGuard};
 use super::Timeline;
 use crate::span::debug_assert_current_span_has_tenant_and_timeline_id;
-use crate::tenant::remote_timeline_client::ShutdownIfArchivedError;
 use crate::tenant::{OffloadedTimeline, Tenant, TenantManifestError, TimelineOrOffloaded};

 #[derive(thiserror::Error, Debug)]
@@ -37,29 +34,28 @@ pub(crate) async fn offload_timeline(
    tracing::info!("offloading archived timeline");

    let allow_offloaded_children = true;
-    let set_stopping = false;
-    let (timeline, guard) = DeleteTimelineFlow::prepare(
-        tenant,
-        timeline.timeline_id,
-        allow_offloaded_children,
-        set_stopping,
-    )
-    .map_err(|e| OffloadError::Other(anyhow::anyhow!(e)))?;
+    let (timeline, guard) =
+        DeleteTimelineFlow::prepare(tenant, timeline.timeline_id, allow_offloaded_children)
+            .map_err(|e| OffloadError::Other(anyhow::anyhow!(e)))?;

    let TimelineOrOffloaded::Timeline(timeline) = timeline else {
        tracing::error!("timeline already offloaded, but given timeline object");
        return Ok(());
    };

-    match timeline.remote_client.shutdown_if_archived().await {
-        Ok(()) => {}
-        Err(ShutdownIfArchivedError::NotInitialized(_)) => {
-            // Either the timeline is being deleted, the operation is being retried, or we are shutting down.
-            // Don't return cancelled here to keep it idempotent.
+    let is_archived = timeline.is_archived();
+    match is_archived {
+        Some(true) => (),
+        Some(false) => {
+            tracing::warn!("tried offloading a non-archived timeline");
+            return Err(OffloadError::NotArchived);
+        }
+        None => {
+            // This is legal: calls to this function can race with the timeline shutting down
+            tracing::info!("tried offloading a timeline whose remote storage is not initialized");
+            return Err(OffloadError::Cancelled);
        }
-        Err(ShutdownIfArchivedError::NotArchived) => return Err(OffloadError::NotArchived),
    }
-    timeline.set_state(TimelineState::Stopping);

    // Now that the Timeline is in Stopping state, request all the related tasks to shut down.
    timeline.shutdown(super::ShutdownMode::Reload).await;
@@ -74,15 +70,6 @@ pub(crate) async fn offload_timeline(

    {
        let mut offloaded_timelines = tenant.timelines_offloaded.lock().unwrap();
-        if matches!(
-            tenant.current_state(),
-            TenantState::Stopping { .. } | TenantState::Broken { .. }
-        ) {
-            // Cancel the operation if the tenant is shutting down. Do this while the
-            // timelines_offloaded lock is held to prevent a race with Tenant::shutdown
-            // for defusing the lock
-            return Err(OffloadError::Cancelled);
-        }
        offloaded_timelines.insert(
            timeline.timeline_id,
            Arc::new(
--- a/pageserver/src/tenant/timeline/walreceiver/walreceiver_connection.rs
+++ b/pageserver/src/tenant/timeline/walreceiver/walreceiver_connection.rs
@@ -319,11 +319,27 @@ pub(super) async fn handle_walreceiver_connection(
            return Ok(());
        }

+        async fn commit(
+            modification: &mut DatadirModification<'_>,
+            uncommitted: &mut u64,
+            filtered: &mut u64,
+            ctx: &RequestContext,
+        ) -> anyhow::Result<()> {
+            WAL_INGEST
+                .records_committed
+                .inc_by(*uncommitted - *filtered);
+            modification.commit(ctx).await?;
+            *uncommitted = 0;
+            *filtered = 0;
+            Ok(())
+        }
+
        let status_update = match replication_message {
            ReplicationMessage::RawInterpretedWalRecords(raw) => {
                WAL_INGEST.bytes_received.inc_by(raw.data().len() as u64);

                let mut uncommitted_records = 0;
+                let mut filtered_records = 0;

                // This is the end LSN of the raw WAL from which the records
                // were interpreted.
@@ -364,23 +380,31 @@ pub(super) async fn handle_walreceiver_connection(
                    if matches!(interpreted.flush_uncommitted, FlushUncommittedRecords::Yes)
                        && uncommitted_records > 0
                    {
-                        modification.commit(&ctx).await?;
-                        uncommitted_records = 0;
+                        commit(
+                            &mut modification,
+                            &mut uncommitted_records,
+                            &mut filtered_records,
+                            &ctx,
+                        )
+                        .await?;
                    }

                    let local_next_record_lsn = interpreted.next_record_lsn;
-
-                    if interpreted.is_observed() {
-                        WAL_INGEST.records_observed.inc();
-                    }
-
-                    walingest
+                    let ingested = walingest
                        .ingest_record(interpreted, &mut modification, &ctx)
                        .await
                        .with_context(|| {
                            format!("could not ingest record at {local_next_record_lsn}")
                        })?;

+                    if !ingested {
+                        tracing::debug!(
+                            "ingest: filtered out record @ LSN {local_next_record_lsn}"
+                        );
+                        WAL_INGEST.records_filtered.inc();
+                        filtered_records += 1;
+                    }
+
                    uncommitted_records += 1;

                    // FIXME: this cannot be made pausable_failpoint without fixing the
@@ -394,8 +418,13 @@ pub(super) async fn handle_walreceiver_connection(
                        || modification.approx_pending_bytes()
                            > DatadirModification::MAX_PENDING_BYTES
                    {
-                        modification.commit(&ctx).await?;
-                        uncommitted_records = 0;
+                        commit(
+                            &mut modification,
+                            &mut uncommitted_records,
+                            &mut filtered_records,
+                            &ctx,
+                        )
+                        .await?;
                    }
                }

@@ -413,7 +442,13 @@ pub(super) async fn handle_walreceiver_connection(

                if uncommitted_records > 0 || needs_last_record_lsn_advance {
                    // Commit any uncommitted records
-                    modification.commit(&ctx).await?;
+                    commit(
+                        &mut modification,
+                        &mut uncommitted_records,
+                        &mut filtered_records,
+                        &ctx,
+                    )
+                    .await?;
                }

                if !caught_up && streaming_lsn >= end_of_wal {
@@ -434,21 +469,6 @@ pub(super) async fn handle_walreceiver_connection(
            }

            ReplicationMessage::XLogData(xlog_data) => {
-                async fn commit(
-                    modification: &mut DatadirModification<'_>,
-                    uncommitted: &mut u64,
-                    filtered: &mut u64,
-                    ctx: &RequestContext,
-                ) -> anyhow::Result<()> {
-                    WAL_INGEST
-                        .records_committed
-                        .inc_by(*uncommitted - *filtered);
-                    modification.commit(ctx).await?;
-                    *uncommitted = 0;
-                    *filtered = 0;
-                    Ok(())
-                }
-
                // Pass the WAL data to the decoder, and see if we can decode
                // more records as a result.
                let data = xlog_data.data();
--- a/pgxn/neon/file_cache.c
+++ b/pgxn/neon/file_cache.c
@@ -541,7 +541,6 @@ lfc_cache_containsv(NRelFileInfo rinfo, ForkNumber forkNum, BlockNumber blkno,
 		}
 		else
 		{
-			LWLockRelease(lfc_lock);
 			return found;
 		}

--- a/pgxn/neon/libpagestore.c
+++ b/pgxn/neon/libpagestore.c
@@ -556,9 +556,6 @@ pageserver_connect(shardno_t shard_no, int elevel)

 		switch (neon_protocol_version)
 		{
-		case 3:
-			pagestream_query = psprintf("pagestream_v3 %s %s", neon_tenant, neon_timeline);
-			break;
 		case 2:
 			pagestream_query = psprintf("pagestream_v2 %s %s", neon_tenant, neon_timeline);
 			break;
@@ -683,7 +680,7 @@ call_PQgetCopyData(shardno_t shard_no, char **buffer)
 	 * but in the cases that take exceptionally long, it's useful to log the
 	 * exact timestamps.
 	 */
-#define LOG_INTERVAL_MS		INT64CONST(10 * 1000)
+#define LOG_INTERVAL_US		UINT64CONST(10 * 1000000)

 	INSTR_TIME_SET_CURRENT(now);
 	start_ts = last_log_ts = now;
@@ -697,7 +694,7 @@ retry:
 		WaitEvent	event;
 		long		timeout;

-		timeout = Max(0, LOG_INTERVAL_MS - INSTR_TIME_GET_MILLISEC(since_last_log));
+		timeout = Min(0, LOG_INTERVAL_US - INSTR_TIME_GET_MICROSEC(since_last_log));

 		/* Sleep until there's something to do */
 		(void) WaitEventSetWait(shard->wes_read, timeout, &event, 1,
@@ -726,7 +723,7 @@ retry:
 		INSTR_TIME_SET_CURRENT(now);
 		since_last_log = now;
 		INSTR_TIME_SUBTRACT(since_last_log, last_log_ts);
-		if (INSTR_TIME_GET_MILLISEC(since_last_log) >= LOG_INTERVAL_MS)
+		if (INSTR_TIME_GET_MICROSEC(since_last_log) >= LOG_INTERVAL_US)
 		{
 			since_start = now;
 			INSTR_TIME_SUBTRACT(since_start, start_ts);
@@ -1138,9 +1135,9 @@ pg_init_libpagestore(void)
 							"Version of compute<->page server protocol",
 							NULL,
 							&neon_protocol_version,
-							2,	/* use protocol version 2 */
-							2,	/* min */
-							3,	/* max */
+							2, /* use protocol version 2 */
+							2, /* min */
+							2, /* max */
 							PGC_SU_BACKEND,
 							0,	/* no flags required */
 							NULL, NULL, NULL);
--- a/pgxn/neon/pagestore_client.h
+++ b/pgxn/neon/pagestore_client.h
@@ -44,15 +44,10 @@ typedef enum
 	T_NeonGetSlruSegmentResponse,
 } NeonMessageTag;

-typedef uint64 NeonRequestId;
-
 /* base struct for c-style inheritance */
 typedef struct
 {
 	NeonMessageTag tag;
-	NeonRequestId reqid;
-	XLogRecPtr	lsn;
-	XLogRecPtr	not_modified_since;
 } NeonMessage;

 #define messageTag(m) (((const NeonMessage *)(m))->tag)
@@ -72,7 +67,6 @@ typedef enum {
 	SLRU_MULTIXACT_OFFSETS
 } SlruKind;

-
 /*--
 * supertype of all the Neon*Request structs below.
 *
@@ -93,37 +87,37 @@ typedef enum {
 *
 * These structs describe the V2 of these requests. (The old now-defunct V1
 * protocol contained just one LSN and a boolean 'latest' flag.)
- *
- * V3 version of protocol adds request ID to all requests. This request ID is also included in response
- * as well as other fields from requests, which allows to verify that we receive response for our request.
- * We copy fields from request to response to make checking more reliable: request ID is formed from process ID
- * and local counter, so in principle there can be duplicated requests IDs if process PID is reused.
 */
-typedef NeonMessage NeonRequest;
+typedef struct
+{
+	NeonMessageTag tag;
+	XLogRecPtr	lsn;
+	XLogRecPtr	not_modified_since;
+} NeonRequest;

 typedef struct
 {
-	NeonRequest hdr;
+	NeonRequest req;
 	NRelFileInfo rinfo;
 	ForkNumber	forknum;
 } NeonExistsRequest;

 typedef struct
 {
-	NeonRequest hdr;
+	NeonRequest req;
 	NRelFileInfo rinfo;
 	ForkNumber	forknum;
 } NeonNblocksRequest;

 typedef struct
 {
-	NeonRequest hdr;
+	NeonRequest req;
 	Oid			dbNode;
 } NeonDbSizeRequest;

 typedef struct
 {
-	NeonRequest hdr;
+	NeonRequest req;
 	NRelFileInfo rinfo;
 	ForkNumber	forknum;
 	BlockNumber blkno;
@@ -131,29 +125,32 @@ typedef struct

 typedef struct
 {
-	NeonRequest hdr;
-	SlruKind	kind;
-	int			segno;
+	NeonRequest req;
+	SlruKind kind;
+	int      segno;
 } NeonGetSlruSegmentRequest;

 /* supertype of all the Neon*Response structs below */
-typedef NeonMessage NeonResponse;
+typedef struct
+{
+	NeonMessageTag tag;
+} NeonResponse;

 typedef struct
 {
-	NeonExistsRequest req;
+	NeonMessageTag tag;
 	bool		exists;
 } NeonExistsResponse;

 typedef struct
 {
-	NeonNblocksRequest req;
+	NeonMessageTag tag;
 	uint32		n_blocks;
 } NeonNblocksResponse;

 typedef struct
 {
-	NeonGetPageRequest req;
+	NeonMessageTag tag;
 	char		page[FLEXIBLE_ARRAY_MEMBER];
 } NeonGetPageResponse;

@@ -161,21 +158,21 @@ typedef struct

 typedef struct
 {
-	NeonDbSizeRequest req;
+	NeonMessageTag tag;
 	int64		db_size;
 } NeonDbSizeResponse;

 typedef struct
 {
-	NeonResponse req;
+	NeonMessageTag tag;
 	char		message[FLEXIBLE_ARRAY_MEMBER]; /* null-terminated error
 												 * message */
 } NeonErrorResponse;

 typedef struct
 {
-	NeonGetSlruSegmentRequest req;
-	int			n_blocks;
+	NeonMessageTag tag;
+	int         n_blocks;
 	char		data[BLCKSZ * SLRU_PAGES_PER_SEGMENT];
 } NeonGetSlruSegmentResponse;

--- a/pgxn/neon/pagestore_smgr.c
+++ b/pgxn/neon/pagestore_smgr.c
@@ -120,9 +120,6 @@ static bool (*old_redo_read_buffer_filter) (XLogReaderState *record, uint8 block

 static BlockNumber neon_nblocks(SMgrRelation reln, ForkNumber forknum);

-static uint32 local_request_counter;
-#define GENERATE_REQUEST_ID() (((NeonRequestId)MyProcPid << 32) | ++local_request_counter)
-
 /*
 * Prefetch implementation:
 *
@@ -191,11 +188,15 @@ typedef struct PrefetchRequest
 	uint8		status;		/* see PrefetchStatus for valid values */
 	uint8		flags;		/* see PrefetchRequestFlags */
 	neon_request_lsns request_lsns;
-	NeonRequestId reqid;
 	NeonResponse *response;		/* may be null */
 	uint64		my_ring_index;
 } PrefetchRequest;

+StaticAssertDecl(sizeof(PrefetchRequest) == 64,
+				 "We prefer to have a power-of-2 size for this struct. Please"
+				 " try to find an alternative solution before reaching to"
+				 " increase the expected size here");
+
 /* prefetch buffer lookup hash table */

 typedef struct PrfHashEntry
@@ -364,7 +365,6 @@ compact_prefetch_buffers(void)
 		target_slot->shard_no = source_slot->shard_no;
 		target_slot->status = source_slot->status;
 		target_slot->response = source_slot->response;
-		target_slot->reqid = source_slot->reqid;
 		target_slot->request_lsns = source_slot->request_lsns;
 		target_slot->my_ring_index = empty_ring_index;

@@ -716,8 +716,6 @@ prefetch_on_ps_disconnect(void)
 		MyPState->ring_receive += 1;

 		prefetch_set_unused(ring_index);
-		pgBufferUsage.prefetch.expired += 1;
-		MyNeonCounters->getpage_prefetch_discards_total += 1;
 	}

 	/*
@@ -798,8 +796,7 @@ prefetch_do_request(PrefetchRequest *slot, neon_request_lsns *force_request_lsns
 	uint64		mySlotNo PG_USED_FOR_ASSERTS_ONLY = slot->my_ring_index;

 	NeonGetPageRequest request = {
-		.hdr.tag = T_NeonGetPageRequest,
-		.hdr.reqid = GENERATE_REQUEST_ID(),
+		.req.tag = T_NeonGetPageRequest,
 		/* lsn and not_modified_since are filled in below */
 		.rinfo = BufTagGetNRelFileInfo(slot->buftag),
 		.forknum = slot->buftag.forkNum,
@@ -808,16 +805,14 @@ prefetch_do_request(PrefetchRequest *slot, neon_request_lsns *force_request_lsns

 	Assert(mySlotNo == MyPState->ring_unused);

-	slot->reqid = request.hdr.reqid;
-
 	if (force_request_lsns)
 		slot->request_lsns = *force_request_lsns;
 	else
 		neon_get_request_lsns(BufTagGetNRelFileInfo(slot->buftag),
 							  slot->buftag.forkNum, slot->buftag.blockNum,
 							  &slot->request_lsns, 1, NULL);
-	request.hdr.lsn = slot->request_lsns.request_lsn;
-	request.hdr.not_modified_since = slot->request_lsns.not_modified_since;
+	request.req.lsn = slot->request_lsns.request_lsn;
+	request.req.not_modified_since = slot->request_lsns.not_modified_since;

 	Assert(slot->response == NULL);
 	Assert(slot->my_ring_index == MyPState->ring_unused);
@@ -940,8 +935,7 @@ Retry:
 					prefetch_set_unused(ring_index);
 					entry = NULL;
 					slot = NULL;
-					pgBufferUsage.prefetch.expired += 1;
-					MyNeonCounters->getpage_prefetch_discards_total += 1;
+					MyNeonCounters->getpage_prefetch_discards_total++;
 				}
 			}

@@ -1032,14 +1026,10 @@ Retry:
 						if (!prefetch_wait_for(cleanup_index))
 							goto Retry;
 						prefetch_set_unused(cleanup_index);
-						pgBufferUsage.prefetch.expired += 1;
-						MyNeonCounters->getpage_prefetch_discards_total += 1;
 						break;
 					case PRFS_RECEIVED:
 					case PRFS_TAG_REMAINS:
 						prefetch_set_unused(cleanup_index);
-						pgBufferUsage.prefetch.expired += 1;
-						MyNeonCounters->getpage_prefetch_discards_total += 1;
 						break;
 					default:
 						pg_unreachable();
@@ -1105,12 +1095,6 @@ Retry:
 	return min_ring_index;
 }

-static bool
-equal_requests(NeonRequest* a, NeonRequest* b)
-{
-	return a->reqid == b->reqid && a->lsn == b->lsn && a->not_modified_since == b->not_modified_since;
-}
-

 /*
 * Note: this function can get canceled and use a long jump to the next catch
@@ -1193,10 +1177,6 @@ nm_pack_request(NeonRequest *msg)
 	initStringInfo(&s);

 	pq_sendbyte(&s, msg->tag);
-	if (neon_protocol_version >= 3)
-	{
-		pq_sendint64(&s, msg->reqid);
-	}
 	pq_sendint64(&s, msg->lsn);
 	pq_sendint64(&s, msg->not_modified_since);

@@ -1274,16 +1254,8 @@ NeonResponse *
 nm_unpack_response(StringInfo s)
 {
 	NeonMessageTag tag = pq_getmsgbyte(s);
-	NeonResponse resp_hdr = {0}; /* make valgrind happy */
 	NeonResponse *resp = NULL;

-	resp_hdr.tag = tag;
-	if (neon_protocol_version >= 3)
-	{
-		resp_hdr.reqid = pq_getmsgint64(s);
-		resp_hdr.lsn = pq_getmsgint64(s);
-		resp_hdr.not_modified_since = pq_getmsgint64(s);
-	}
 	switch (tag)
 	{
 			/* pagestore -> pagestore_client */
@@ -1291,14 +1263,7 @@ nm_unpack_response(StringInfo s)
 			{
 				NeonExistsResponse *msg_resp = palloc0(sizeof(NeonExistsResponse));

-				if (neon_protocol_version >= 3)
-				{
-					NInfoGetSpcOid(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					NInfoGetDbOid(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					NInfoGetRelNumber(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					msg_resp->req.forknum = pq_getmsgbyte(s);
-				}
-				msg_resp->req.hdr = resp_hdr;
+				msg_resp->tag = tag;
 				msg_resp->exists = pq_getmsgbyte(s);
 				pq_getmsgend(s);

@@ -1310,14 +1275,7 @@ nm_unpack_response(StringInfo s)
 			{
 				NeonNblocksResponse *msg_resp = palloc0(sizeof(NeonNblocksResponse));

-				if (neon_protocol_version >= 3)
-				{
-					NInfoGetSpcOid(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					NInfoGetDbOid(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					NInfoGetRelNumber(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					msg_resp->req.forknum = pq_getmsgbyte(s);
-				}
-				msg_resp->req.hdr = resp_hdr;
+				msg_resp->tag = tag;
 				msg_resp->n_blocks = pq_getmsgint(s, 4);
 				pq_getmsgend(s);

@@ -1330,20 +1288,12 @@ nm_unpack_response(StringInfo s)
 				NeonGetPageResponse *msg_resp;

 				msg_resp = MemoryContextAllocZero(MyPState->bufctx, PS_GETPAGERESPONSE_SIZE);
-				if (neon_protocol_version >= 3)
-				{
-					NInfoGetSpcOid(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					NInfoGetDbOid(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					NInfoGetRelNumber(msg_resp->req.rinfo) = pq_getmsgint(s, 4);
-					msg_resp->req.forknum = pq_getmsgbyte(s);
-					msg_resp->req.blkno = pq_getmsgint(s, 4);
-				}
-				msg_resp->req.hdr = resp_hdr;
+				msg_resp->tag = tag;
 				/* XXX:	should be varlena */
 				memcpy(msg_resp->page, pq_getmsgbytes(s, BLCKSZ), BLCKSZ);
 				pq_getmsgend(s);

-				Assert(msg_resp->req.hdr.tag == T_NeonGetPageResponse);
+				Assert(msg_resp->tag == T_NeonGetPageResponse);

 				resp = (NeonResponse *) msg_resp;
 				break;
@@ -1353,11 +1303,7 @@ nm_unpack_response(StringInfo s)
 			{
 				NeonDbSizeResponse *msg_resp = palloc0(sizeof(NeonDbSizeResponse));

-				if (neon_protocol_version >= 3)
-				{
-					msg_resp->req.dbNode = pq_getmsgint(s, 4);
-				}
-				msg_resp->req.hdr = resp_hdr;
+				msg_resp->tag = tag;
 				msg_resp->db_size = pq_getmsgint64(s);
 				pq_getmsgend(s);

@@ -1375,7 +1321,7 @@ nm_unpack_response(StringInfo s)
 				msglen = strlen(msgtext);

 				msg_resp = palloc0(sizeof(NeonErrorResponse) + msglen + 1);
-				msg_resp->req = resp_hdr;
+				msg_resp->tag = tag;
 				memcpy(msg_resp->message, msgtext, msglen + 1);
 				pq_getmsgend(s);

@@ -1386,17 +1332,9 @@ nm_unpack_response(StringInfo s)
 		case T_NeonGetSlruSegmentResponse:
 		    {
 				NeonGetSlruSegmentResponse *msg_resp;
-				int n_blocks;
-				msg_resp = palloc0(sizeof(NeonGetSlruSegmentResponse));
-
-				if (neon_protocol_version >= 3)
-				{
-					msg_resp->req.kind = pq_getmsgbyte(s);
-					msg_resp->req.segno = pq_getmsgint(s, 4);
-				}
-				msg_resp->req.hdr = resp_hdr;
-
-				n_blocks = pq_getmsgint(s, 4);
+				int n_blocks = pq_getmsgint(s, 4);
+				msg_resp = palloc(sizeof(NeonGetSlruSegmentResponse));
+				msg_resp->tag = tag;
 				msg_resp->n_blocks = n_blocks;
 				memcpy(msg_resp->data, pq_getmsgbytes(s, n_blocks * BLCKSZ), n_blocks * BLCKSZ);
 				pq_getmsgend(s);
@@ -1441,8 +1379,8 @@ nm_to_string(NeonMessage *msg)
 				appendStringInfoString(&s, "{\"type\": \"NeonExistsRequest\"");
 				appendStringInfo(&s, ", \"rinfo\": \"%u/%u/%u\"", RelFileInfoFmt(msg_req->rinfo));
 				appendStringInfo(&s, ", \"forknum\": %d", msg_req->forknum);
-				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.lsn));
-				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.not_modified_since));
+				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.lsn));
+				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.not_modified_since));
 				appendStringInfoChar(&s, '}');
 				break;
 			}
@@ -1454,8 +1392,8 @@ nm_to_string(NeonMessage *msg)
 				appendStringInfoString(&s, "{\"type\": \"NeonNblocksRequest\"");
 				appendStringInfo(&s, ", \"rinfo\": \"%u/%u/%u\"", RelFileInfoFmt(msg_req->rinfo));
 				appendStringInfo(&s, ", \"forknum\": %d", msg_req->forknum);
-				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.lsn));
-				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.not_modified_since));
+				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.lsn));
+				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.not_modified_since));
 				appendStringInfoChar(&s, '}');
 				break;
 			}
@@ -1468,8 +1406,8 @@ nm_to_string(NeonMessage *msg)
 				appendStringInfo(&s, ", \"rinfo\": \"%u/%u/%u\"", RelFileInfoFmt(msg_req->rinfo));
 				appendStringInfo(&s, ", \"forknum\": %d", msg_req->forknum);
 				appendStringInfo(&s, ", \"blkno\": %u", msg_req->blkno);
-				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.lsn));
-				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.not_modified_since));
+				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.lsn));
+				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.not_modified_since));
 				appendStringInfoChar(&s, '}');
 				break;
 			}
@@ -1479,8 +1417,8 @@ nm_to_string(NeonMessage *msg)

 				appendStringInfoString(&s, "{\"type\": \"NeonDbSizeRequest\"");
 				appendStringInfo(&s, ", \"dbnode\": \"%u\"", msg_req->dbNode);
-				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.lsn));
-				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.not_modified_since));
+				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.lsn));
+				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.not_modified_since));
 				appendStringInfoChar(&s, '}');
 				break;
 			}
@@ -1491,8 +1429,8 @@ nm_to_string(NeonMessage *msg)
 				appendStringInfoString(&s, "{\"type\": \"NeonGetSlruSegmentRequest\"");
 				appendStringInfo(&s, ", \"kind\": %u", msg_req->kind);
 				appendStringInfo(&s, ", \"segno\": %u", msg_req->segno);
-				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.lsn));
-				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->hdr.not_modified_since));
+				appendStringInfo(&s, ", \"lsn\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.lsn));
+				appendStringInfo(&s, ", \"not_modified_since\": \"%X/%X\"", LSN_FORMAT_ARGS(msg_req->req.not_modified_since));
 				appendStringInfoChar(&s, '}');
 				break;
 			}
@@ -2367,64 +2305,39 @@ neon_exists(SMgrRelation reln, ForkNumber forkNum)
 						  REL_METADATA_PSEUDO_BLOCKNO, &request_lsns, 1, NULL);
 	{
 		NeonExistsRequest request = {
-			.hdr.tag = T_NeonExistsRequest,
-			.hdr.reqid = GENERATE_REQUEST_ID(),
-			.hdr.lsn = request_lsns.request_lsn,
-			.hdr.not_modified_since = request_lsns.not_modified_since,
+			.req.tag = T_NeonExistsRequest,
+			.req.lsn = request_lsns.request_lsn,
+			.req.not_modified_since = request_lsns.not_modified_since,
 			.rinfo = InfoFromSMgrRel(reln),
 			.forknum = forkNum
 		};

 		resp = page_server_request(&request);
-
-		switch (resp->tag)
-		{
-			case T_NeonExistsResponse:
-			{
-				NeonExistsResponse* exists_resp = (NeonExistsResponse *) resp;
-				if (neon_protocol_version >= 3)
-				{
-					if (!equal_requests(resp, &request.hdr) ||
-						!RelFileInfoEquals(exists_resp->req.rinfo, request.rinfo) ||
-						exists_resp->req.forknum != request.forknum)
-					{
-						NEON_PANIC_CONNECTION_STATE(-1, PANIC,
-													"Unexpect response {reqid=%lx,lsn=%X/%08X, since=%X/%08X, rel=%u/%u/%u.%u} to exits request {reqid=%lx,lsn=%X/%08X, since=%X/%08X, rel=%u/%u/%u.%u}",
-													resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since), RelFileInfoFmt(exists_resp->req.rinfo), exists_resp->req.forknum,
-													request.hdr.reqid, LSN_FORMAT_ARGS(request.hdr.lsn), LSN_FORMAT_ARGS(request.hdr.not_modified_since), RelFileInfoFmt(request.rinfo), request.forknum);
-					}
-				}
-				exists = exists_resp->exists;
-				break;
-			}
-			case T_NeonErrorResponse:
-				if (neon_protocol_version >= 3)
-				{
-					if (!equal_requests(resp, &request.hdr))
-					{
-						elog(WARNING, NEON_TAG "Error message {reqid=%lx,lsn=%X/%08X, since=%X/%08X} doesn't match exists request {reqid=%lx,lsn=%X/%08X, since=%X/%08X}",
-							 resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since),
-							 request.hdr.reqid, LSN_FORMAT_ARGS(request.hdr.lsn), LSN_FORMAT_ARGS(request.hdr.not_modified_since));
-					}
-				}
-				ereport(ERROR,
-						(errcode(ERRCODE_IO_ERROR),
-						 errmsg(NEON_TAG "[reqid %lx] could not read relation existence of rel %u/%u/%u.%u from page server at lsn %X/%08X",
-								resp->reqid,
-								RelFileInfoFmt(InfoFromSMgrRel(reln)),
-								forkNum,
-								LSN_FORMAT_ARGS(request_lsns.effective_request_lsn)),
-						 errdetail("page server returned error: %s",
-								   ((NeonErrorResponse *) resp)->message)));
-				break;
-
-			default:
-				NEON_PANIC_CONNECTION_STATE(-1, PANIC,
-											"Expected Exists (0x%02x) or Error (0x%02x) response to ExistsRequest, but got 0x%02x",
-											T_NeonExistsResponse, T_NeonErrorResponse, resp->tag);
-		}
-		pfree(resp);
 	}
+
+	switch (resp->tag)
+	{
+		case T_NeonExistsResponse:
+			exists = ((NeonExistsResponse *) resp)->exists;
+			break;
+
+		case T_NeonErrorResponse:
+			ereport(ERROR,
+					(errcode(ERRCODE_IO_ERROR),
+					 errmsg(NEON_TAG "could not read relation existence of rel %u/%u/%u.%u from page server at lsn %X/%08X",
+							RelFileInfoFmt(InfoFromSMgrRel(reln)),
+							forkNum,
+							LSN_FORMAT_ARGS(request_lsns.effective_request_lsn)),
+					 errdetail("page server returned error: %s",
+							   ((NeonErrorResponse *) resp)->message)));
+			break;
+
+		default:
+			NEON_PANIC_CONNECTION_STATE(-1, PANIC,
+										"Expected Exists (0x%02x) or Error (0x%02x) response to ExistsRequest, but got 0x%02x",
+										T_NeonExistsResponse, T_NeonErrorResponse, resp->tag);
+	}
+	pfree(resp);
 	return exists;
 }

@@ -3032,43 +2945,15 @@ Retry:
 		switch (resp->tag)
 		{
 			case T_NeonGetPageResponse:
-			{
-				NeonGetPageResponse* getpage_resp = (NeonGetPageResponse *) resp;
-				if (neon_protocol_version >= 3)
-				{
-					if (resp->reqid != slot->reqid ||
-						resp->lsn != slot->request_lsns.request_lsn ||
-						resp->not_modified_since != slot->request_lsns.not_modified_since ||
-						!RelFileInfoEquals(getpage_resp->req.rinfo, rinfo) ||
-						getpage_resp->req.forknum != forkNum ||
-						getpage_resp->req.blkno != base_blockno + i)
-					{
-						NEON_PANIC_CONNECTION_STATE(-1, PANIC,
-													"Unexpect response {reqid=%lx,lsn=%X/%08X, since=%X/%08X, rel=%u/%u/%u.%u, block=%u} to get page request {reqid=%lx,lsn=%X/%08X, since=%X/%08X, rel=%u/%u/%u.%u, block=%u}",
-													resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since), RelFileInfoFmt(getpage_resp->req.rinfo), getpage_resp->req.forknum, getpage_resp->req.blkno,
-													slot->reqid, LSN_FORMAT_ARGS(slot->request_lsns.request_lsn), LSN_FORMAT_ARGS(slot->request_lsns.not_modified_since), RelFileInfoFmt(rinfo), forkNum, base_blockno + i);
-					}
-				}
-				memcpy(buffer, getpage_resp->page, BLCKSZ);
+				memcpy(buffer, ((NeonGetPageResponse *) resp)->page, BLCKSZ);
 				lfc_write(rinfo, forkNum, blockno, buffer);
 				break;
-			}
+
 			case T_NeonErrorResponse:
-				if (neon_protocol_version >= 3)
-				{
-					if (resp->reqid != slot->reqid ||
-						resp->lsn != slot->request_lsns.request_lsn ||
-						resp->not_modified_since != slot->request_lsns.not_modified_since)
-					{
-						elog(WARNING, NEON_TAG "Error message {reqid=%lx,lsn=%X/%08X, since=%X/%08X} doesn't match get relsize request {reqid=%lx,lsn=%X/%08X, since=%X/%08X}",
-							 resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since),
-							 slot->reqid, LSN_FORMAT_ARGS(slot->request_lsns.request_lsn), LSN_FORMAT_ARGS(slot->request_lsns.not_modified_since));
-					}
-				}
 				ereport(ERROR,
 						(errcode(ERRCODE_IO_ERROR),
-						 errmsg(NEON_TAG "[shard %d, reqid %lx] could not read block %u in rel %u/%u/%u.%u from page server at lsn %X/%08X",
-								slot->shard_no, resp->reqid, blockno, RelFileInfoFmt(rinfo),
+						 errmsg(NEON_TAG "[shard %d] could not read block %u in rel %u/%u/%u.%u from page server at lsn %X/%08X",
+								slot->shard_no, blockno, RelFileInfoFmt(rinfo),
 								forkNum, LSN_FORMAT_ARGS(reqlsns->effective_request_lsn)),
 						 errdetail("page server returned error: %s",
 								   ((NeonErrorResponse *) resp)->message)));
@@ -3551,72 +3436,47 @@ neon_nblocks(SMgrRelation reln, ForkNumber forknum)

 	{
 		NeonNblocksRequest request = {
-			.hdr.tag = T_NeonNblocksRequest,
-			.hdr.reqid = GENERATE_REQUEST_ID(),
-			.hdr.lsn = request_lsns.request_lsn,
-			.hdr.not_modified_since = request_lsns.not_modified_since,
+			.req.tag = T_NeonNblocksRequest,
+			.req.lsn = request_lsns.request_lsn,
+			.req.not_modified_since = request_lsns.not_modified_since,
 			.rinfo = InfoFromSMgrRel(reln),
 			.forknum = forknum,
 		};

 		resp = page_server_request(&request);
-
-		switch (resp->tag)
-		{
-			case T_NeonNblocksResponse:
-			{
-				NeonNblocksResponse * relsize_resp = (NeonNblocksResponse *) resp;
-				if (neon_protocol_version >= 3)
-				{
-					if (!equal_requests(resp, &request.hdr) ||
-						!RelFileInfoEquals(relsize_resp->req.rinfo, request.rinfo) ||
-						relsize_resp->req.forknum != forknum)
-					{
-						NEON_PANIC_CONNECTION_STATE(-1, PANIC,
-													"Unexpect response {reqid=%lx,lsn=%X/%08X, since=%X/%08X, rel=%u/%u/%u.%u} to get relsize request {reqid=%lx,lsn=%X/%08X, since=%X/%08X, rel=%u/%u/%u.%u}",
-													resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since), RelFileInfoFmt(relsize_resp->req.rinfo), relsize_resp->req.forknum,
-													request.hdr.reqid, LSN_FORMAT_ARGS(request.hdr.lsn), LSN_FORMAT_ARGS(request.hdr.not_modified_since), RelFileInfoFmt(request.rinfo), forknum);
-					}
-				}
-				n_blocks = relsize_resp->n_blocks;
-				break;
-			}
-			case T_NeonErrorResponse:
-				if (neon_protocol_version >= 3)
-				{
-					if (!equal_requests(resp, &request.hdr))
-					{
-						elog(WARNING, NEON_TAG "Error message {reqid=%lx,lsn=%X/%08X, since=%X/%08X} doesn't match get relsize request {reqid=%lx,lsn=%X/%08X, since=%X/%08X}",
-							 resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since),
-							 request.hdr.reqid, LSN_FORMAT_ARGS(request.hdr.lsn), LSN_FORMAT_ARGS(request.hdr.not_modified_since));
-					}
-				}
-				ereport(ERROR,
-						(errcode(ERRCODE_IO_ERROR),
-						 errmsg(NEON_TAG "[reqid %lx] could not read relation size of rel %u/%u/%u.%u from page server at lsn %X/%08X",
-								resp->reqid,
-								RelFileInfoFmt(InfoFromSMgrRel(reln)),
-								forknum,
-								LSN_FORMAT_ARGS(request_lsns.effective_request_lsn)),
-						 errdetail("page server returned error: %s",
-								   ((NeonErrorResponse *) resp)->message)));
-				break;
-
-			default:
-				NEON_PANIC_CONNECTION_STATE(-1, PANIC,
-											"Expected Nblocks (0x%02x) or Error (0x%02x) response to NblocksRequest, but got 0x%02x",
-											T_NeonNblocksResponse, T_NeonErrorResponse, resp->tag);
-		}
-		update_cached_relsize(InfoFromSMgrRel(reln), forknum, n_blocks);
-
-		neon_log(SmgrTrace, "neon_nblocks: rel %u/%u/%u fork %u (request LSN %X/%08X): %u blocks",
-				 RelFileInfoFmt(InfoFromSMgrRel(reln)),
-				 forknum,
-				 LSN_FORMAT_ARGS(request_lsns.effective_request_lsn),
-				 n_blocks);
-
-		pfree(resp);
 	}
+
+	switch (resp->tag)
+	{
+		case T_NeonNblocksResponse:
+			n_blocks = ((NeonNblocksResponse *) resp)->n_blocks;
+			break;
+
+		case T_NeonErrorResponse:
+			ereport(ERROR,
+					(errcode(ERRCODE_IO_ERROR),
+					 errmsg(NEON_TAG "could not read relation size of rel %u/%u/%u.%u from page server at lsn %X/%08X",
+							RelFileInfoFmt(InfoFromSMgrRel(reln)),
+							forknum,
+							LSN_FORMAT_ARGS(request_lsns.effective_request_lsn)),
+					 errdetail("page server returned error: %s",
+							   ((NeonErrorResponse *) resp)->message)));
+			break;
+
+		default:
+			NEON_PANIC_CONNECTION_STATE(-1, PANIC,
+										"Expected Nblocks (0x%02x) or Error (0x%02x) response to NblocksRequest, but got 0x%02x",
+										T_NeonNblocksResponse, T_NeonErrorResponse, resp->tag);
+	}
+	update_cached_relsize(InfoFromSMgrRel(reln), forknum, n_blocks);
+
+	neon_log(SmgrTrace, "neon_nblocks: rel %u/%u/%u fork %u (request LSN %X/%08X): %u blocks",
+			 RelFileInfoFmt(InfoFromSMgrRel(reln)),
+			 forknum,
+			 LSN_FORMAT_ARGS(request_lsns.effective_request_lsn),
+			 n_blocks);
+
+	pfree(resp);
 	return n_blocks;
 }

@@ -3636,64 +3496,40 @@ neon_dbsize(Oid dbNode)

 	{
 		NeonDbSizeRequest request = {
-			.hdr.tag = T_NeonDbSizeRequest,
-			.hdr.reqid = GENERATE_REQUEST_ID(),
-			.hdr.lsn = request_lsns.request_lsn,
-			.hdr.not_modified_since = request_lsns.not_modified_since,
+			.req.tag = T_NeonDbSizeRequest,
+			.req.lsn = request_lsns.request_lsn,
+			.req.not_modified_since = request_lsns.not_modified_since,
 			.dbNode = dbNode,
 		};

 		resp = page_server_request(&request);
-
-		switch (resp->tag)
-		{
-			case T_NeonDbSizeResponse:
-			{
-				NeonDbSizeResponse* dbsize_resp = (NeonDbSizeResponse *) resp;
-				if (neon_protocol_version >= 3)
-				{
-					if (!equal_requests(resp, &request.hdr) ||
-						dbsize_resp->req.dbNode != dbNode)
-					{
-						NEON_PANIC_CONNECTION_STATE(-1, PANIC,
-													"Unexpect response {reqid=%lx,lsn=%X/%08X, since=%X/%08X, dbNode=%u} to get DB size request {reqid=%lx,lsn=%X/%08X, since=%X/%08X, dbNode=%u}",
-													resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since), dbsize_resp->req.dbNode,
-													request.hdr.reqid, LSN_FORMAT_ARGS(request.hdr.lsn), LSN_FORMAT_ARGS(request.hdr.not_modified_since), dbNode);
-					}
-				}
-				db_size = dbsize_resp->db_size;
-				break;
-			}
-			case T_NeonErrorResponse:
-				if (neon_protocol_version >= 3)
-				{
-					if (!equal_requests(resp, &request.hdr))
-					{
-						elog(WARNING, NEON_TAG "Error message {reqid=%lx,lsn=%X/%08X, since=%X/%08X} doesn't match get DB size request {reqid=%lx,lsn=%X/%08X, since=%X/%08X}",
-							 resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since),
-							 request.hdr.reqid, LSN_FORMAT_ARGS(request.hdr.lsn), LSN_FORMAT_ARGS(request.hdr.not_modified_since));
-					}
-				}
-				ereport(ERROR,
-						(errcode(ERRCODE_IO_ERROR),
-						 errmsg(NEON_TAG "[reqid %lx] could not read db size of db %u from page server at lsn %X/%08X",
-								resp->reqid,
-								dbNode, LSN_FORMAT_ARGS(request_lsns.effective_request_lsn)),
-						 errdetail("page server returned error: %s",
-								   ((NeonErrorResponse *) resp)->message)));
-				break;
-
-			default:
-				NEON_PANIC_CONNECTION_STATE(-1, PANIC,
-											"Expected DbSize (0x%02x) or Error (0x%02x) response to DbSizeRequest, but got 0x%02x",
-											T_NeonDbSizeResponse, T_NeonErrorResponse, resp->tag);
-		}
-
-		neon_log(SmgrTrace, "neon_dbsize: db %u (request LSN %X/%08X): %ld bytes",
-				 dbNode, LSN_FORMAT_ARGS(request_lsns.effective_request_lsn), db_size);
-
-		pfree(resp);
 	}
+
+	switch (resp->tag)
+	{
+		case T_NeonDbSizeResponse:
+			db_size = ((NeonDbSizeResponse *) resp)->db_size;
+			break;
+
+		case T_NeonErrorResponse:
+			ereport(ERROR,
+					(errcode(ERRCODE_IO_ERROR),
+					 errmsg(NEON_TAG "could not read db size of db %u from page server at lsn %X/%08X",
+							dbNode, LSN_FORMAT_ARGS(request_lsns.effective_request_lsn)),
+					 errdetail("page server returned error: %s",
+							   ((NeonErrorResponse *) resp)->message)));
+			break;
+
+		default:
+			NEON_PANIC_CONNECTION_STATE(-1, PANIC,
+										"Expected DbSize (0x%02x) or Error (0x%02x) response to DbSizeRequest, but got 0x%02x",
+										T_NeonDbSizeResponse, T_NeonErrorResponse, resp->tag);
+	}
+
+	neon_log(SmgrTrace, "neon_dbsize: db %u (request LSN %X/%08X): %ld bytes",
+			 dbNode, LSN_FORMAT_ARGS(request_lsns.effective_request_lsn), db_size);
+
+	pfree(resp);
 	return db_size;
 }

@@ -4025,17 +3861,16 @@ neon_read_slru_segment(SMgrRelation reln, const char* path, int segno, void* buf
 		return -1;

 	request = (NeonGetSlruSegmentRequest) {
-		.hdr.tag = T_NeonGetSlruSegmentRequest,
-		.hdr.reqid = GENERATE_REQUEST_ID(),
-		.hdr.lsn = request_lsn,
-		.hdr.not_modified_since = not_modified_since,
+		.req.tag = T_NeonGetSlruSegmentRequest,
+		.req.lsn = request_lsn,
+		.req.not_modified_since = not_modified_since,
 		.kind = kind,
 		.segno = segno
 	};

 	do
 	{
-		while (!page_server->send(shard_no, &request.hdr) || !page_server->flush(shard_no));
+		while (!page_server->send(shard_no, &request.req) || !page_server->flush(shard_no));

 		consume_prefetch_responses();

@@ -4045,38 +3880,14 @@ neon_read_slru_segment(SMgrRelation reln, const char* path, int segno, void* buf
 	switch (resp->tag)
 	{
 		case T_NeonGetSlruSegmentResponse:
-		{
-			NeonGetSlruSegmentResponse* slru_resp = (NeonGetSlruSegmentResponse *) resp;
-			if (neon_protocol_version >= 3)
-			{
-				if (!equal_requests(resp, &request.hdr) ||
-					slru_resp->req.kind != kind ||
-					slru_resp->req.segno != segno)
-				{
-					NEON_PANIC_CONNECTION_STATE(-1, PANIC,
-												"Unexpect response {reqid=%lx,lsn=%X/%08X, since=%X/%08X, kind=%u, segno=%u} to get SLRU segment request {reqid=%lx,lsn=%X/%08X, since=%X/%08X, kind=%u, segno=%u}",
-												resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since), slru_resp->req.kind, slru_resp->req.segno,
-												request.hdr.reqid, LSN_FORMAT_ARGS(request.hdr.lsn), LSN_FORMAT_ARGS(request.hdr.not_modified_since), kind, segno);
-				}
-			}
-			n_blocks = slru_resp->n_blocks;
-			memcpy(buffer, slru_resp->data, n_blocks*BLCKSZ);
+			n_blocks = ((NeonGetSlruSegmentResponse *) resp)->n_blocks;
+			memcpy(buffer, ((NeonGetSlruSegmentResponse *) resp)->data, n_blocks*BLCKSZ);
 			break;
-		}
+
 		case T_NeonErrorResponse:
-			if (neon_protocol_version >= 3)
-			{
-				if (!equal_requests(resp, &request.hdr))
-				{
-					elog(WARNING, NEON_TAG "Error message {reqid=%lx,lsn=%X/%08X, since=%X/%08X} doesn't match get SLRU segment request {reqid=%lx,lsn=%X/%08X, since=%X/%08X}",
-						 resp->reqid, LSN_FORMAT_ARGS(resp->lsn), LSN_FORMAT_ARGS(resp->not_modified_since),
-						 request.hdr.reqid, LSN_FORMAT_ARGS(request.hdr.lsn), LSN_FORMAT_ARGS(request.hdr.not_modified_since));
-				}
-			}
 			ereport(ERROR,
 					(errcode(ERRCODE_IO_ERROR),
-					 errmsg(NEON_TAG "[reqid %lx] could not read SLRU %d segment %d at lsn %X/%08X",
-							resp->reqid,
+					 errmsg(NEON_TAG "could not read SLRU %d segment %d at lsn %X/%08X",
 							kind,
 							segno,
 							LSN_FORMAT_ARGS(request_lsn)),
@@ -4215,9 +4026,8 @@ neon_extend_rel_size(NRelFileInfo rinfo, ForkNumber forknum, BlockNumber blkno,
 		NeonResponse *response;
 		NeonNblocksResponse *nbresponse;
 		NeonNblocksRequest request = {
-			.hdr = (NeonRequest) {
+			.req = (NeonRequest) {
 				.tag = T_NeonNblocksRequest,
-				.reqid = GENERATE_REQUEST_ID(),
 				.lsn = end_recptr,
 				.not_modified_since = end_recptr,
 			},
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.5 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.4 and should not be changed by hand.

 [[package]]
 name = "aiohappyeyeballs"
@@ -239,66 +239,60 @@ files = [

 [[package]]
 name = "asyncpg"
-version = "0.30.0"
+version = "0.29.0"
 description = "An asyncio PostgreSQL driver"
 optional = false
 python-versions = ">=3.8.0"
 files = [
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-    {file = "asyncpg-0.30.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:dc1f62c792752a49f88b7e6f774c26077091b44caceb1983509edc18a2222ec0"},
-    {file = "asyncpg-0.30.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:3152fef2e265c9c24eec4ee3d22b4f4d2703d30614b0b6753e9ed4115c8a146f"},
-    {file = "asyncpg-0.30.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:c7255812ac85099a0e1ffb81b10dc477b9973345793776b128a23e60148dd1af"},
-    {file = "asyncpg-0.30.0-cp310-cp310-musllinux_1_2_aarch64.whl", hash = "sha256:578445f09f45d1ad7abddbff2a3c7f7c291738fdae0abffbeb737d3fc3ab8b75"},
-    {file = "asyncpg-0.30.0-cp310-cp310-musllinux_1_2_x86_64.whl", hash = "sha256:c42f6bb65a277ce4d93f3fba46b91a265631c8df7250592dd4f11f8b0152150f"},
-    {file = "asyncpg-0.30.0-cp310-cp310-win32.whl", hash = "sha256:aa403147d3e07a267ada2ae34dfc9324e67ccc4cdca35261c8c22792ba2b10cf"},
-    {file = "asyncpg-0.30.0-cp310-cp310-win_amd64.whl", hash = "sha256:fb622c94db4e13137c4c7f98834185049cc50ee01d8f657ef898b6407c7b9c50"},
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-    {file = "asyncpg-0.30.0-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:1c198a00cce9506fcd0bf219a799f38ac7a237745e1d27f0e1f66d3707c84a5a"},
-    {file = "asyncpg-0.30.0-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:3326e6d7381799e9735ca2ec9fd7be4d5fef5dcbc3cb555d8a463d8460607956"},
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-    {file = "asyncpg-0.30.0-cp311-cp311-win32.whl", hash = "sha256:574156480df14f64c2d76450a3f3aaaf26105869cad3865041156b38459e935d"},
-    {file = "asyncpg-0.30.0-cp311-cp311-win_amd64.whl", hash = "sha256:3356637f0bd830407b5597317b3cb3571387ae52ddc3bca6233682be88bbbc1f"},
-    {file = "asyncpg-0.30.0-cp312-cp312-macosx_10_13_x86_64.whl", hash = "sha256:c902a60b52e506d38d7e80e0dd5399f657220f24635fee368117b8b5fce1142e"},
-    {file = "asyncpg-0.30.0-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:aca1548e43bbb9f0f627a04666fedaca23db0a31a84136ad1f868cb15deb6e3a"},
-    {file = "asyncpg-0.30.0-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:6c2a2ef565400234a633da0eafdce27e843836256d40705d83ab7ec42074efb3"},
-    {file = "asyncpg-0.30.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:1292b84ee06ac8a2ad8e51c7475aa309245874b61333d97411aab835c4a2f737"},
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+    {file = "zstandard-0.21.0.tar.gz", hash = "sha256:f08e3a10d01a247877e4cb61a82a319ea746c356a3786558bed2481e6c405546"},
 ]

 [package.dependencies]
@@ -3655,4 +3524,4 @@ cffi = ["cffi (>=1.11)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "e6904aca09abc6c805604b21a5702a97e0056406f9ec7469b091d35ee10a6b16"
+content-hash = "426c385df93f578ba3537c40a269535e27fbcca1978b3cf266096ecbc298c6a9"
--- a/proxy/README.md
+++ b/proxy/README.md
@@ -102,39 +102,23 @@ User can pass several optional headers that will affect resulting json.
 2. `Neon-Array-Mode: true`. Return postgres rows as arrays instead of objects. That is more compact representation and also helps in some edge
 cases where it is hard to use rows represented as objects (e.g. when several fields have the same name).

-## Test proxy locally

-Proxy determines project name from the subdomain, request to the `round-rice-566201.somedomain.tld` will be routed to the project named `round-rice-566201`. Unfortunately, `/etc/hosts` does not support domain wildcards, so we can use *.localtest.me` which resolves to `127.0.0.1`.
+## Using SNI-based routing on localhost
+
+Now proxy determines project name from the subdomain, request to the `round-rice-566201.somedomain.tld` will be routed to the project named `round-rice-566201`. Unfortunately, `/etc/hosts` does not support domain wildcards, so I usually use `*.localtest.me` which resolves to `127.0.0.1`. Now we can create self-signed certificate and play with proxy:

-Let's create self-signed certificate by running:
 ```sh
 openssl req -new -x509 -days 365 -nodes -text -out server.crt -keyout server.key -subj "/CN=*.localtest.me"
 ```

-Then we need to build proxy with 'testing' feature and run, e.g.:
+start proxy
+
 ```sh
-RUST_LOG=proxy cargo run -p proxy --bin proxy --features testing -- --auth-backend postgres --auth-endpoint 'postgresql://proxy:password@endpoint.localtest.me:5432/postgres' --is-private-access-proxy true -c server.crt -k server.key
+./target/debug/proxy -c server.crt -k server.key
 ```

-We will also need to have a postgres instance. Assuming that we have setted up docker we can set it up as follows:
+and connect to it
+
 ```sh
-docker run \
-  --detach \
-  --name proxy-postgres \
-  --env POSTGRES_PASSWORD=proxy-postgres \
-  --publish 5432:5432 \
-  postgres:17-bookworm
+PGSSLROOTCERT=./server.crt psql 'postgres://my-cluster-42.localtest.me:1234?sslmode=verify-full'
 ```
-
-Next step is setting up auth table and schema as well as creating role (without the JWT table):
-```sh
-docker exec -it proxy-postgres psql -U postgres -c "CREATE SCHEMA IF NOT EXISTS neon_control_plane"
-docker exec -it proxy-postgres psql -U postgres -c "CREATE TABLE neon_control_plane.endpoints (endpoint_id VARCHAR(255) PRIMARY KEY, allowed_ips VARCHAR(255))"
-docker exec -it proxy-postgres psql -U postgres -c "CREATE ROLE proxy WITH SUPERUSER LOGIN PASSWORD 'password';"
-```
-
-Now from client you can start a new session:
-
-```sh
-PGSSLROOTCERT=./server.crt psql  "postgresql://proxy:password@endpoint.localtest.me:4432/postgres?sslmode=verify-full"
-```
--- a/proxy/src/auth/backend/console_redirect.rs
+++ b/proxy/src/auth/backend/console_redirect.rs
@@ -1,5 +1,3 @@
-use std::fmt;
-
 use async_trait::async_trait;
 use postgres_client::config::SslMode;
 use pq_proto::BeMessage as Be;
@@ -7,19 +5,15 @@ use thiserror::Error;
 use tokio::io::{AsyncRead, AsyncWrite};
 use tracing::{info, info_span};

-use super::{ComputeCredentialKeys, ControlPlaneApi};
-use crate::auth::backend::{BackendIpAllowlist, ComputeUserInfo};
+use super::ComputeCredentialKeys;
 use crate::auth::IpPattern;
 use crate::cache::Cached;
 use crate::config::AuthenticationConfig;
 use crate::context::RequestContext;
-use crate::control_plane::client::cplane_proxy_v1;
 use crate::control_plane::{self, CachedNodeInfo, NodeInfo};
 use crate::error::{ReportableError, UserFacingError};
 use crate::proxy::connect_compute::ComputeConnectBackend;
-use crate::proxy::NeonOptions;
 use crate::stream::PqStream;
-use crate::types::RoleName;
 use crate::{auth, compute, waiters};

 #[derive(Debug, Error)]
@@ -37,13 +31,6 @@ pub(crate) enum ConsoleRedirectError {
 #[derive(Debug)]
 pub struct ConsoleRedirectBackend {
    console_uri: reqwest::Url,
-    api: cplane_proxy_v1::NeonControlPlaneClient,
-}
-
-impl fmt::Debug for cplane_proxy_v1::NeonControlPlaneClient {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "NeonControlPlaneClient")
-    }
 }

 impl UserFacingError for ConsoleRedirectError {
@@ -84,24 +71,9 @@ pub(crate) fn new_psql_session_id() -> String {
    hex::encode(rand::random::<[u8; 8]>())
 }

-#[async_trait]
-impl BackendIpAllowlist for ConsoleRedirectBackend {
-    async fn get_allowed_ips(
-        &self,
-        ctx: &RequestContext,
-        user_info: &ComputeUserInfo,
-    ) -> auth::Result<Vec<auth::IpPattern>> {
-        self.api
-            .get_allowed_ips_and_secret(ctx, user_info)
-            .await
-            .map(|(ips, _)| ips.as_ref().clone())
-            .map_err(|e| e.into())
-    }
-}
-
 impl ConsoleRedirectBackend {
-    pub fn new(console_uri: reqwest::Url, api: cplane_proxy_v1::NeonControlPlaneClient) -> Self {
-        Self { console_uri, api }
+    pub fn new(console_uri: reqwest::Url) -> Self {
+        Self { console_uri }
    }

    pub(crate) async fn authenticate(
@@ -109,16 +81,10 @@ impl ConsoleRedirectBackend {
        ctx: &RequestContext,
        auth_config: &'static AuthenticationConfig,
        client: &mut PqStream<impl AsyncRead + AsyncWrite + Unpin>,
-    ) -> auth::Result<(
-        ConsoleRedirectNodeInfo,
-        ComputeUserInfo,
-        Option<Vec<IpPattern>>,
-    )> {
+    ) -> auth::Result<(ConsoleRedirectNodeInfo, Option<Vec<IpPattern>>)> {
        authenticate(ctx, auth_config, &self.console_uri, client)
            .await
-            .map(|(node_info, user_info, ip_allowlist)| {
-                (ConsoleRedirectNodeInfo(node_info), user_info, ip_allowlist)
-            })
+            .map(|(node_info, ip_allowlist)| (ConsoleRedirectNodeInfo(node_info), ip_allowlist))
    }
 }

@@ -143,7 +109,7 @@ async fn authenticate(
    auth_config: &'static AuthenticationConfig,
    link_uri: &reqwest::Url,
    client: &mut PqStream<impl AsyncRead + AsyncWrite + Unpin>,
-) -> auth::Result<(NodeInfo, ComputeUserInfo, Option<Vec<IpPattern>>)> {
+) -> auth::Result<(NodeInfo, Option<Vec<IpPattern>>)> {
    ctx.set_auth_method(crate::context::AuthMethod::ConsoleRedirect);

    // registering waiter can fail if we get unlucky with rng.
@@ -198,15 +164,8 @@ async fn authenticate(
    let mut config = compute::ConnCfg::new(db_info.host.to_string(), db_info.port);
    config.dbname(&db_info.dbname).user(&db_info.user);

-    let user: RoleName = db_info.user.into();
-    let user_info = ComputeUserInfo {
-        endpoint: db_info.aux.endpoint_id.as_str().into(),
-        user: user.clone(),
-        options: NeonOptions::default(),
-    };
-
    ctx.set_dbname(db_info.dbname.into());
-    ctx.set_user(user);
+    ctx.set_user(db_info.user.into());
    ctx.set_project(db_info.aux.clone());
    info!("woken up a compute node");

@@ -229,7 +188,6 @@ async fn authenticate(
            config,
            aux: db_info.aux,
        },
-        user_info,
        db_info.allowed_ips,
    ))
 }
--- a/proxy/src/auth/backend/mod.rs
+++ b/proxy/src/auth/backend/mod.rs
@@ -16,9 +16,7 @@ use tokio::io::{AsyncRead, AsyncWrite};
 use tracing::{debug, info, warn};

 use crate::auth::credentials::check_peer_addr_is_in_list;
-use crate::auth::{
-    self, validate_password_and_exchange, AuthError, ComputeUserInfoMaybeEndpoint, IpPattern,
-};
+use crate::auth::{self, validate_password_and_exchange, AuthError, ComputeUserInfoMaybeEndpoint};
 use crate::cache::Cached;
 use crate::config::AuthenticationConfig;
 use crate::context::RequestContext;
@@ -133,7 +131,7 @@ pub(crate) struct ComputeUserInfoNoEndpoint {
    pub(crate) options: NeonOptions,
 }

-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Clone)]
 pub(crate) struct ComputeUserInfo {
    pub(crate) endpoint: EndpointId,
    pub(crate) user: RoleName,
@@ -246,15 +244,6 @@ impl AuthenticationConfig {
    }
 }

-#[async_trait::async_trait]
-pub(crate) trait BackendIpAllowlist {
-    async fn get_allowed_ips(
-        &self,
-        ctx: &RequestContext,
-        user_info: &ComputeUserInfo,
-    ) -> auth::Result<Vec<auth::IpPattern>>;
-}
-
 /// True to its name, this function encapsulates our current auth trade-offs.
 /// Here, we choose the appropriate auth flow based on circumstances.
 ///
@@ -267,7 +256,7 @@ async fn auth_quirks(
    allow_cleartext: bool,
    config: &'static AuthenticationConfig,
    endpoint_rate_limiter: Arc<EndpointRateLimiter>,
-) -> auth::Result<(ComputeCredentials, Option<Vec<IpPattern>>)> {
+) -> auth::Result<ComputeCredentials> {
    // If there's no project so far, that entails that client doesn't
    // support SNI or other means of passing the endpoint (project) name.
    // We now expect to see a very specific payload in the place of password.
@@ -326,7 +315,7 @@ async fn auth_quirks(
    )
    .await
    {
-        Ok(keys) => Ok((keys, Some(allowed_ips.as_ref().clone()))),
+        Ok(keys) => Ok(keys),
        Err(e) => {
            if e.is_password_failed() {
                // The password could have been changed, so we invalidate the cache.
@@ -396,7 +385,7 @@ impl<'a> Backend<'a, ComputeUserInfoMaybeEndpoint> {
        allow_cleartext: bool,
        config: &'static AuthenticationConfig,
        endpoint_rate_limiter: Arc<EndpointRateLimiter>,
-    ) -> auth::Result<(Backend<'a, ComputeCredentials>, Option<Vec<IpPattern>>)> {
+    ) -> auth::Result<Backend<'a, ComputeCredentials>> {
        let res = match self {
            Self::ControlPlane(api, user_info) => {
                debug!(
@@ -405,7 +394,7 @@ impl<'a> Backend<'a, ComputeUserInfoMaybeEndpoint> {
                    "performing authentication using the console"
                );

-                let (credentials, ip_allowlist) = auth_quirks(
+                let credentials = auth_quirks(
                    ctx,
                    &*api,
                    user_info,
@@ -415,7 +404,7 @@ impl<'a> Backend<'a, ComputeUserInfoMaybeEndpoint> {
                    endpoint_rate_limiter,
                )
                .await?;
-                Ok((Backend::ControlPlane(api, credentials), ip_allowlist))
+                Backend::ControlPlane(api, credentials)
            }
            Self::Local(_) => {
                return Err(auth::AuthError::bad_auth_method("invalid for local proxy"))
@@ -424,7 +413,7 @@ impl<'a> Backend<'a, ComputeUserInfoMaybeEndpoint> {

        // TODO: replace with some metric
        info!("user successfully authenticated");
-        res
+        Ok(res)
    }
 }

@@ -452,24 +441,6 @@ impl Backend<'_, ComputeUserInfo> {
    }
 }

-#[async_trait::async_trait]
-impl BackendIpAllowlist for Backend<'_, ()> {
-    async fn get_allowed_ips(
-        &self,
-        ctx: &RequestContext,
-        user_info: &ComputeUserInfo,
-    ) -> auth::Result<Vec<auth::IpPattern>> {
-        let auth_data = match self {
-            Self::ControlPlane(api, ()) => api.get_allowed_ips_and_secret(ctx, user_info).await,
-            Self::Local(_) => Ok((Cached::new_uncached(Arc::new(vec![])), None)),
-        };
-
-        auth_data
-            .map(|(ips, _)| ips.as_ref().clone())
-            .map_err(|e| e.into())
-    }
-}
-
 #[async_trait::async_trait]
 impl ComputeConnectBackend for Backend<'_, ComputeCredentials> {
    async fn wake_compute(
@@ -815,7 +786,7 @@ mod tests {
        .await
        .unwrap();

-        assert_eq!(creds.0.info.endpoint, "my-endpoint");
+        assert_eq!(creds.info.endpoint, "my-endpoint");

        handle.await.unwrap();
    }
--- a/proxy/src/auth/flow.rs
+++ b/proxy/src/auth/flow.rs
@@ -10,6 +10,7 @@ use tracing::info;

 use super::backend::ComputeCredentialKeys;
 use super::{AuthError, PasswordHackPayload};
+use crate::config::TlsServerEndPoint;
 use crate::context::RequestContext;
 use crate::control_plane::AuthSecret;
 use crate::intern::EndpointIdInt;
@@ -17,7 +18,6 @@ use crate::sasl;
 use crate::scram::threadpool::ThreadPool;
 use crate::scram::{self};
 use crate::stream::{PqStream, Stream};
-use crate::tls::TlsServerEndPoint;

 /// Every authentication selector is supposed to implement this trait.
 pub(crate) trait AuthMethod {
--- a/proxy/src/bin/local_proxy.rs
+++ b/proxy/src/bin/local_proxy.rs
@@ -13,9 +13,7 @@ use proxy::auth::backend::jwt::JwkCache;
 use proxy::auth::backend::local::{LocalBackend, JWKS_ROLE_MAP};
 use proxy::auth::{self};
 use proxy::cancellation::CancellationHandlerMain;
-use proxy::config::{
-    self, AuthenticationConfig, ComputeConfig, HttpConfig, ProxyConfig, RetryConfig,
-};
+use proxy::config::{self, AuthenticationConfig, HttpConfig, ProxyConfig, RetryConfig};
 use proxy::control_plane::locks::ApiLocks;
 use proxy::control_plane::messages::{EndpointJwksResponse, JwksSettings};
 use proxy::http::health_server::AppMetrics;
@@ -27,7 +25,6 @@ use proxy::rate_limiter::{
 use proxy::scram::threadpool::ThreadPool;
 use proxy::serverless::cancel_set::CancelSet;
 use proxy::serverless::{self, GlobalConnPoolOptions};
-use proxy::tls::client_config::compute_client_config_with_root_certs;
 use proxy::types::RoleName;
 use proxy::url::ApiUrl;

@@ -212,7 +209,6 @@ async fn main() -> anyhow::Result<()> {
        http_listener,
        shutdown.clone(),
        Arc::new(CancellationHandlerMain::new(
-            &config.connect_to_compute,
            Arc::new(DashMap::new()),
            None,
            proxy::metrics::CancellationSource::Local,
@@ -272,12 +268,6 @@ fn build_config(args: &LocalProxyCliArgs) -> anyhow::Result<&'static ProxyConfig
        max_response_size_bytes: args.sql_over_http.sql_over_http_max_response_size_bytes,
    };

-    let compute_config = ComputeConfig {
-        retry: RetryConfig::parse(RetryConfig::CONNECT_TO_COMPUTE_DEFAULT_VALUES)?,
-        tls: Arc::new(compute_client_config_with_root_certs()?),
-        timeout: Duration::from_secs(2),
-    };
-
    Ok(Box::leak(Box::new(ProxyConfig {
        tls_config: None,
        metric_collection: None,
@@ -299,7 +289,9 @@ fn build_config(args: &LocalProxyCliArgs) -> anyhow::Result<&'static ProxyConfig
        region: "local".into(),
        wake_compute_retry_config: RetryConfig::parse(RetryConfig::WAKE_COMPUTE_DEFAULT_VALUES)?,
        connect_compute_locks,
-        connect_to_compute: compute_config,
+        connect_to_compute_retry_config: RetryConfig::parse(
+            RetryConfig::CONNECT_TO_COMPUTE_DEFAULT_VALUES,
+        )?,
    })))
 }

--- a/proxy/src/bin/pg_sni_router.rs
+++ b/proxy/src/bin/pg_sni_router.rs
@@ -10,12 +10,12 @@ use clap::Arg;
 use futures::future::Either;
 use futures::TryFutureExt;
 use itertools::Itertools;
+use proxy::config::TlsServerEndPoint;
 use proxy::context::RequestContext;
 use proxy::metrics::{Metrics, ThreadPoolMetrics};
 use proxy::protocol2::ConnectionInfo;
 use proxy::proxy::{copy_bidirectional_client_compute, run_until_cancelled, ErrorSource};
 use proxy::stream::{PqStream, Stream};
-use proxy::tls::TlsServerEndPoint;
 use rustls::crypto::ring;
 use rustls::pki_types::PrivateKeyDer;
 use tokio::io::{AsyncRead, AsyncWrite};
--- a/proxy/src/bin/proxy.rs
+++ b/proxy/src/bin/proxy.rs
@@ -1,7 +1,6 @@
 use std::net::SocketAddr;
 use std::pin::pin;
 use std::sync::Arc;
-use std::time::Duration;

 use anyhow::bail;
 use futures::future::Either;
@@ -9,7 +8,7 @@ use proxy::auth::backend::jwt::JwkCache;
 use proxy::auth::backend::{AuthRateLimiter, ConsoleRedirectBackend, MaybeOwned};
 use proxy::cancellation::{CancelMap, CancellationHandler};
 use proxy::config::{
-    self, remote_storage_from_toml, AuthenticationConfig, CacheOptions, ComputeConfig, HttpConfig,
+    self, remote_storage_from_toml, AuthenticationConfig, CacheOptions, HttpConfig,
    ProjectInfoCacheOptions, ProxyConfig, ProxyProtocolV2,
 };
 use proxy::context::parquet::ParquetUploadArgs;
@@ -24,7 +23,6 @@ use proxy::redis::{elasticache, notifications};
 use proxy::scram::threadpool::ThreadPool;
 use proxy::serverless::cancel_set::CancelSet;
 use proxy::serverless::GlobalConnPoolOptions;
-use proxy::tls::client_config::compute_client_config_with_root_certs;
 use proxy::{auth, control_plane, http, serverless, usage_metrics};
 use remote_storage::RemoteStorageConfig;
 use tokio::net::TcpListener;
@@ -399,7 +397,6 @@ async fn main() -> anyhow::Result<()> {
    let cancellation_handler = Arc::new(CancellationHandler::<
        Option<Arc<Mutex<RedisPublisherClient>>>,
    >::new(
-        &config.connect_to_compute,
        cancel_map.clone(),
        redis_publisher,
        proxy::metrics::CancellationSource::FromClient,
@@ -495,7 +492,6 @@ async fn main() -> anyhow::Result<()> {
                    let cache = api.caches.project_info.clone();
                    if let Some(client) = client1 {
                        maintenance_tasks.spawn(notifications::task_main(
-                            config,
                            client,
                            cache.clone(),
                            cancel_map.clone(),
@@ -504,7 +500,6 @@ async fn main() -> anyhow::Result<()> {
                    }
                    if let Some(client) = client2 {
                        maintenance_tasks.spawn(notifications::task_main(
-                            config,
                            client,
                            cache.clone(),
                            cancel_map.clone(),
@@ -637,12 +632,6 @@ fn build_config(args: &ProxyCliArgs) -> anyhow::Result<&'static ProxyConfig> {
        console_redirect_confirmation_timeout: args.webauth_confirmation_timeout,
    };

-    let compute_config = ComputeConfig {
-        retry: config::RetryConfig::parse(&args.connect_to_compute_retry)?,
-        tls: Arc::new(compute_client_config_with_root_certs()?),
-        timeout: Duration::from_secs(2),
-    };
-
    let config = ProxyConfig {
        tls_config,
        metric_collection,
@@ -653,7 +642,9 @@ fn build_config(args: &ProxyCliArgs) -> anyhow::Result<&'static ProxyConfig> {
        region: args.region.clone(),
        wake_compute_retry_config: config::RetryConfig::parse(&args.wake_compute_retry)?,
        connect_compute_locks,
-        connect_to_compute: compute_config,
+        connect_to_compute_retry_config: config::RetryConfig::parse(
+            &args.connect_to_compute_retry,
+        )?,
    };

    let config = Box::leak(Box::new(config));
@@ -744,59 +735,9 @@ fn build_auth_backend(
        }

        AuthBackendType::ConsoleRedirect => {
-            let wake_compute_cache_config: CacheOptions = args.wake_compute_cache.parse()?;
-            let project_info_cache_config: ProjectInfoCacheOptions =
-                args.project_info_cache.parse()?;
-            let endpoint_cache_config: config::EndpointCacheConfig =
-                args.endpoint_cache_config.parse()?;
+            let url = args.uri.parse()?;
+            let backend = ConsoleRedirectBackend::new(url);

-            info!("Using NodeInfoCache (wake_compute) with options={wake_compute_cache_config:?}");
-            info!(
-                "Using AllowedIpsCache (wake_compute) with options={project_info_cache_config:?}"
-            );
-            info!("Using EndpointCacheConfig with options={endpoint_cache_config:?}");
-            let caches = Box::leak(Box::new(control_plane::caches::ApiCaches::new(
-                wake_compute_cache_config,
-                project_info_cache_config,
-                endpoint_cache_config,
-            )));
-
-            let config::ConcurrencyLockOptions {
-                shards,
-                limiter,
-                epoch,
-                timeout,
-            } = args.wake_compute_lock.parse()?;
-            info!(?limiter, shards, ?epoch, "Using NodeLocks (wake_compute)");
-            let locks = Box::leak(Box::new(control_plane::locks::ApiLocks::new(
-                "wake_compute_lock",
-                limiter,
-                shards,
-                timeout,
-                epoch,
-                &Metrics::get().wake_compute_lock,
-            )?));
-
-            let url = args.uri.clone().parse()?;
-            let ep_url: proxy::url::ApiUrl = args.auth_endpoint.parse()?;
-            let endpoint = http::Endpoint::new(ep_url, http::new_client());
-            let mut wake_compute_rps_limit = args.wake_compute_limit.clone();
-            RateBucketInfo::validate(&mut wake_compute_rps_limit)?;
-            let wake_compute_endpoint_rate_limiter =
-                Arc::new(WakeComputeRateLimiter::new(wake_compute_rps_limit));
-
-            // Since we use only get_allowed_ips_and_secret() wake_compute_endpoint_rate_limiter
-            // and locks are not used in ConsoleRedirectBackend,
-            // but they are required by the NeonControlPlaneClient
-            let api = control_plane::client::cplane_proxy_v1::NeonControlPlaneClient::new(
-                endpoint,
-                args.control_plane_token.clone(),
-                caches,
-                locks,
-                wake_compute_endpoint_rate_limiter,
-            );
-
-            let backend = ConsoleRedirectBackend::new(url, api);
            let config = Box::leak(Box::new(backend));

            Ok(Either::Right(config))
--- a/proxy/src/cancellation.rs
+++ b/proxy/src/cancellation.rs
@@ -3,27 +3,27 @@ use std::sync::Arc;

 use dashmap::DashMap;
 use ipnet::{IpNet, Ipv4Net, Ipv6Net};
+use once_cell::sync::OnceCell;
 use postgres_client::tls::MakeTlsConnect;
 use postgres_client::CancelToken;
 use pq_proto::CancelKeyData;
+use rustls::crypto::ring;
 use thiserror::Error;
 use tokio::net::TcpStream;
 use tokio::sync::Mutex;
 use tracing::{debug, info};
 use uuid::Uuid;

-use crate::auth::backend::{BackendIpAllowlist, ComputeUserInfo};
-use crate::auth::{check_peer_addr_is_in_list, AuthError, IpPattern};
-use crate::config::ComputeConfig;
-use crate::context::RequestContext;
+use crate::auth::{check_peer_addr_is_in_list, IpPattern};
+use crate::compute::load_certs;
 use crate::error::ReportableError;
 use crate::ext::LockExt;
 use crate::metrics::{CancellationRequest, CancellationSource, Metrics};
+use crate::postgres_rustls::MakeRustlsConnect;
 use crate::rate_limiter::LeakyBucketRateLimiter;
 use crate::redis::cancellation_publisher::{
    CancellationPublisher, CancellationPublisherMut, RedisPublisherClient,
 };
-use crate::tls::postgres_rustls::MakeRustlsConnect;

 pub type CancelMap = Arc<DashMap<CancelKeyData, Option<CancelClosure>>>;
 pub type CancellationHandlerMain = CancellationHandler<Option<Arc<Mutex<RedisPublisherClient>>>>;
@@ -35,7 +35,6 @@ type IpSubnetKey = IpNet;
 ///
 /// If `CancellationPublisher` is available, cancel request will be used to publish the cancellation key to other proxy instances.
 pub struct CancellationHandler<P> {
-    compute_config: &'static ComputeConfig,
    map: CancelMap,
    client: P,
    /// This field used for the monitoring purposes.
@@ -58,9 +57,6 @@ pub(crate) enum CancelError {

    #[error("IP is not allowed")]
    IpNotAllowed,
-
-    #[error("Authentication backend error")]
-    AuthError(#[from] AuthError),
 }

 impl ReportableError for CancelError {
@@ -73,7 +69,6 @@ impl ReportableError for CancelError {
            CancelError::Postgres(_) => crate::error::ErrorKind::Compute,
            CancelError::RateLimit => crate::error::ErrorKind::RateLimit,
            CancelError::IpNotAllowed => crate::error::ErrorKind::User,
-            CancelError::AuthError(_) => crate::error::ErrorKind::ControlPlane,
        }
    }
 }
@@ -108,7 +103,10 @@ impl<P: CancellationPublisher> CancellationHandler<P> {
        }
    }

-    /// Cancelling only in notification, will be removed
+    /// Try to cancel a running query for the corresponding connection.
+    /// If the cancellation key is not found, it will be published to Redis.
+    /// check_allowed - if true, check if the IP is allowed to cancel the query
+    /// return Result primarily for tests
    pub(crate) async fn cancel_session(
        &self,
        key: CancelKeyData,
@@ -137,8 +135,7 @@ impl<P: CancellationPublisher> CancellationHandler<P> {
        }

        // NB: we should immediately release the lock after cloning the token.
-        let cancel_state = self.map.get(&key).and_then(|x| x.clone());
-        let Some(cancel_closure) = cancel_state else {
+        let Some(cancel_closure) = self.map.get(&key).and_then(|x| x.clone()) else {
            tracing::warn!("query cancellation key not found: {key}");
            Metrics::get()
                .proxy
@@ -186,97 +183,7 @@ impl<P: CancellationPublisher> CancellationHandler<P> {
            "cancelling query per user's request using key {key}, hostname {}, address: {}",
            cancel_closure.hostname, cancel_closure.socket_addr
        );
-        cancel_closure.try_cancel_query(self.compute_config).await
-    }
-
-    /// Try to cancel a running query for the corresponding connection.
-    /// If the cancellation key is not found, it will be published to Redis.
-    /// check_allowed - if true, check if the IP is allowed to cancel the query.
-    /// Will fetch IP allowlist internally.
-    ///
-    /// return Result primarily for tests
-    pub(crate) async fn cancel_session_auth<T: BackendIpAllowlist>(
-        &self,
-        key: CancelKeyData,
-        ctx: RequestContext,
-        check_allowed: bool,
-        auth_backend: &T,
-    ) -> Result<(), CancelError> {
-        // TODO: check for unspecified address is only for backward compatibility, should be removed
-        if !ctx.peer_addr().is_unspecified() {
-            let subnet_key = match ctx.peer_addr() {
-                IpAddr::V4(ip) => IpNet::V4(Ipv4Net::new_assert(ip, 24).trunc()), // use defaut mask here
-                IpAddr::V6(ip) => IpNet::V6(Ipv6Net::new_assert(ip, 64).trunc()),
-            };
-            if !self.limiter.lock_propagate_poison().check(subnet_key, 1) {
-                // log only the subnet part of the IP address to know which subnet is rate limited
-                tracing::warn!("Rate limit exceeded. Skipping cancellation message, {subnet_key}");
-                Metrics::get()
-                    .proxy
-                    .cancellation_requests_total
-                    .inc(CancellationRequest {
-                        source: self.from,
-                        kind: crate::metrics::CancellationOutcome::RateLimitExceeded,
-                    });
-                return Err(CancelError::RateLimit);
-            }
-        }
-
-        // NB: we should immediately release the lock after cloning the token.
-        let cancel_state = self.map.get(&key).and_then(|x| x.clone());
-        let Some(cancel_closure) = cancel_state else {
-            tracing::warn!("query cancellation key not found: {key}");
-            Metrics::get()
-                .proxy
-                .cancellation_requests_total
-                .inc(CancellationRequest {
-                    source: self.from,
-                    kind: crate::metrics::CancellationOutcome::NotFound,
-                });
-
-            if ctx.session_id() == Uuid::nil() {
-                // was already published, do not publish it again
-                return Ok(());
-            }
-
-            match self
-                .client
-                .try_publish(key, ctx.session_id(), ctx.peer_addr())
-                .await
-            {
-                Ok(()) => {} // do nothing
-                Err(e) => {
-                    // log it here since cancel_session could be spawned in a task
-                    tracing::error!("failed to publish cancellation key: {key}, error: {e}");
-                    return Err(CancelError::IO(std::io::Error::new(
-                        std::io::ErrorKind::Other,
-                        e.to_string(),
-                    )));
-                }
-            }
-            return Ok(());
-        };
-
-        let ip_allowlist = auth_backend
-            .get_allowed_ips(&ctx, &cancel_closure.user_info)
-            .await
-            .map_err(CancelError::AuthError)?;
-
-        if check_allowed && !check_peer_addr_is_in_list(&ctx.peer_addr(), &ip_allowlist) {
-            // log it here since cancel_session could be spawned in a task
-            tracing::warn!("IP is not allowed to cancel the query: {key}");
-            return Err(CancelError::IpNotAllowed);
-        }
-
-        Metrics::get()
-            .proxy
-            .cancellation_requests_total
-            .inc(CancellationRequest {
-                source: self.from,
-                kind: crate::metrics::CancellationOutcome::Found,
-            });
-        info!("cancelling query per user's request using key {key}");
-        cancel_closure.try_cancel_query(self.compute_config).await
+        cancel_closure.try_cancel_query().await
    }

    #[cfg(test)]
@@ -291,13 +198,8 @@ impl<P: CancellationPublisher> CancellationHandler<P> {
 }

 impl CancellationHandler<()> {
-    pub fn new(
-        compute_config: &'static ComputeConfig,
-        map: CancelMap,
-        from: CancellationSource,
-    ) -> Self {
+    pub fn new(map: CancelMap, from: CancellationSource) -> Self {
        Self {
-            compute_config,
            map,
            client: (),
            from,
@@ -312,14 +214,8 @@ impl CancellationHandler<()> {
 }

 impl<P: CancellationPublisherMut> CancellationHandler<Option<Arc<Mutex<P>>>> {
-    pub fn new(
-        compute_config: &'static ComputeConfig,
-        map: CancelMap,
-        client: Option<Arc<Mutex<P>>>,
-        from: CancellationSource,
-    ) -> Self {
+    pub fn new(map: CancelMap, client: Option<Arc<Mutex<P>>>, from: CancellationSource) -> Self {
        Self {
-            compute_config,
            map,
            client,
            from,
@@ -333,6 +229,8 @@ impl<P: CancellationPublisherMut> CancellationHandler<Option<Arc<Mutex<P>>>> {
    }
 }

+static TLS_ROOTS: OnceCell<Arc<rustls::RootCertStore>> = OnceCell::new();
+
 /// This should've been a [`std::future::Future`], but
 /// it's impossible to name a type of an unboxed future
 /// (we'd need something like `#![feature(type_alias_impl_trait)]`).
@@ -342,7 +240,6 @@ pub struct CancelClosure {
    cancel_token: CancelToken,
    ip_allowlist: Vec<IpPattern>,
    hostname: String, // for pg_sni router
-    user_info: ComputeUserInfo,
 }

 impl CancelClosure {
@@ -351,25 +248,36 @@ impl CancelClosure {
        cancel_token: CancelToken,
        ip_allowlist: Vec<IpPattern>,
        hostname: String,
-        user_info: ComputeUserInfo,
    ) -> Self {
        Self {
            socket_addr,
            cancel_token,
            ip_allowlist,
            hostname,
-            user_info,
        }
    }
    /// Cancels the query running on user's compute node.
-    pub(crate) async fn try_cancel_query(
-        self,
-        compute_config: &ComputeConfig,
-    ) -> Result<(), CancelError> {
+    pub(crate) async fn try_cancel_query(self) -> Result<(), CancelError> {
        let socket = TcpStream::connect(self.socket_addr).await?;

-        let mut mk_tls =
-            crate::tls::postgres_rustls::MakeRustlsConnect::new(compute_config.tls.clone());
+        let root_store = TLS_ROOTS
+            .get_or_try_init(load_certs)
+            .map_err(|_e| {
+                CancelError::IO(std::io::Error::new(
+                    std::io::ErrorKind::Other,
+                    "TLS root store initialization failed".to_string(),
+                ))
+            })?
+            .clone();
+
+        let client_config =
+            rustls::ClientConfig::builder_with_provider(Arc::new(ring::default_provider()))
+                .with_safe_default_protocol_versions()
+                .expect("ring should support the default protocol versions")
+                .with_root_certificates(root_store)
+                .with_no_client_auth();
+
+        let mut mk_tls = crate::postgres_rustls::MakeRustlsConnect::new(client_config);
        let tls = <MakeRustlsConnect as MakeTlsConnect<tokio::net::TcpStream>>::make_tls_connect(
            &mut mk_tls,
            &self.hostname,
@@ -385,8 +293,6 @@ impl CancelClosure {
        debug!("query was cancelled");
        Ok(())
    }
-
-    /// Obsolete (will be removed after moving CancelMap to Redis), only for notifications
    pub(crate) fn set_ip_allowlist(&mut self, ip_allowlist: Vec<IpPattern>) {
        self.ip_allowlist = ip_allowlist;
    }
@@ -423,30 +329,11 @@ impl<P> Drop for Session<P> {
 #[cfg(test)]
 #[expect(clippy::unwrap_used)]
 mod tests {
-    use std::time::Duration;
-
    use super::*;
-    use crate::config::RetryConfig;
-    use crate::tls::client_config::compute_client_config_with_certs;
-
-    fn config() -> ComputeConfig {
-        let retry = RetryConfig {
-            base_delay: Duration::from_secs(1),
-            max_retries: 5,
-            backoff_factor: 2.0,
-        };
-
-        ComputeConfig {
-            retry,
-            tls: Arc::new(compute_client_config_with_certs(std::iter::empty())),
-            timeout: Duration::from_secs(2),
-        }
-    }

    #[tokio::test]
    async fn check_session_drop() -> anyhow::Result<()> {
        let cancellation_handler = Arc::new(CancellationHandler::<()>::new(
-            Box::leak(Box::new(config())),
            CancelMap::default(),
            CancellationSource::FromRedis,
        ));
@@ -462,11 +349,8 @@ mod tests {

    #[tokio::test]
    async fn cancel_session_noop_regression() {
-        let handler = CancellationHandler::<()>::new(
-            Box::leak(Box::new(config())),
-            CancelMap::default(),
-            CancellationSource::Local,
-        );
+        let handler =
+            CancellationHandler::<()>::new(CancelMap::default(), CancellationSource::Local);
        handler
            .cancel_session(
                CancelKeyData {
--- a/Show More
+++ b/Show More