Tenant size information is gathered by using existing parts of
`Tenant::gc_iteration` which are now separated as
`Tenant::refresh_gc_info`. `Tenant::refresh_gc_info` collects branch
points, and invokes `Timeline::update_gc_info`; nothing was supposed to
be changed there. The gathered branch points (through Timeline's
`GcInfo::retain_lsns`), `GcInfo::horizon_cutoff`, and
`GcInfo::pitr_cutoff` are used to build up a Vec of updates fed into the
`libs/tenant_size_model` to calculate the history size.
The gathered information is now exposed using `GET
/v1/tenant/{tenant_id}/size`, which which will respond with the actual
calculated size. Initially the idea was to have this delivered as tenant
background task and exported via metric, but it might be too
computationally expensive to run it periodically as we don't yet know if
the returned values are any good.
Adds one new metric:
- pageserver_storage_operations_seconds with label `logical_size`
- separating from original `init_logical_size`
Adds a pageserver wide configuration variable:
- `concurrent_tenant_size_logical_size_queries` with default 1
This leaves a lot of TODO's, tracked on issue #2748.
* Support configuring the log format as json or plain.
Separately test json and plain logger. They would be competing on the
same global subscriber otherwise.
* Implement log_format for pageserver config
* Implement configurable log format for safekeeper.
Speeds up layer_map::search somewhat. I also opened a PR in the upstream
rust-amplify repository with these changes,
see https://github.com/rust-amplify/rust-amplify/pull/148. We can switch
back to upstream version when that's merged.
* etcd-client is not updated, since we plan to replace it with another client and the new version errors with some missing prost library error
* clap had released another major update that requires changing every CLI declaration again, deserves a separate PR
Creates new `pageserver_api` and `safekeeper_api` crates to serve as the
shared dependencies. Should reduce both recompile times and cold compile
times.
Decreases the size of the optimized `neon_local` binary: 380M -> 179M.
No significant changes for anything else (mostly as expected).
Compute node startup time is very important. After launching
PostgreSQL, use 'notify' to be notified immediately when it has
updated the PID file, instead of polling. The polling loop had 100 ms
interval so this shaves up to 100 ms from the startup time.
Replace the layer array and linear search with R-tree
So far, the in-memory layer map that holds information about layer
files that exist, has used a simple Vec, in no particular order, to
hold information about all the layers. That obviously doesn't scale
very well; with thousands of layer files the linear search was
consuming a lot of CPU. Replace it with a two-dimensional R-tree, with
Key and LSN ranges as the dimensions.
For the R-tree, use the 'rstar' crate. To be able to use that, we
convert the Keys and LSNs into 256-bit integers. 64 bits would be
enough to represent LSNs, and 128 bits would be enough to represent
Keys. However, we use 256 bits, because rstar internally performs
multiplication to calculate the area of rectangles, and the result of
multiplying two 128 bit integers doesn't necessarily fit in 128 bits,
causing integer overflow and, if overflow-checks are enabled,
panic. To avoid that, we use 256 bit integers.
Add a performance test that creates a lot of layer files, to
demonstrate the benefit.
This commit does two things of note:
1. Bumps the bindgen dependency from `0.59.1` to `0.60.1`. This gets us
an actual error type from bindgen, so we can display what's wrong.
2. Adds `anyhow` as a build dependency, so our error message can be
prettier. It's already used heavily elsewhere in the crates in this
repo, so I figured the fact it's a build dependency doesn't matter
much.
I ran into this from running `cargo <cmd>` without running `make` first.
Here's a comparison of the compiler output in those two cases.
Before this commit:
```
error: failed to run custom build command for `postgres_ffi v0.1.0 ($repo_path/libs/postgres_ffi)`
Caused by:
process didn't exit successfully: `$repo_path/target/debug/build/postgres_ffi-2f7253b3ad3ca840/build-script-build` (exit status: 101)
--- stdout
cargo:rerun-if-changed=bindgen_deps.h
--- stderr
bindgen_deps.h:7:10: fatal error: 'c.h' file not found
bindgen_deps.h:7:10: fatal error: 'c.h' file not found, err: true
thread 'main' panicked at 'Unable to generate bindings: ()', libs/postgres_ffi/build.rs:135:14
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```
After this commit:
```
error: failed to run custom build command for `postgres_ffi v0.1.0 ($repo_path/libs/postgres_ffi)`
Caused by:
process didn't exit successfully: `$repo_path/target/debug/build/postgres_ffi-e01fb59602596748/build-script-build` (exit status: 1)
--- stdout
cargo:rerun-if-changed=bindgen_deps.h
--- stderr
bindgen_deps.h:7:10: fatal error: 'c.h' file not found
Error: Unable to generate bindings
Caused by:
clang diagnosed error: bindgen_deps.h:7:10: fatal error: 'c.h' file not found
```
Instead of spawning helper threads, we now use Tokio tasks. There
are multiple Tokio runtimes, for different kinds of tasks. One for
serving libpq client connections, another for background operations
like GC and compaction, and so on. That's not strictly required, we
could use just one runtime, but with this you can still get an
overview of what's happening with "top -H".
There's one subtle behavior in how TenantState is updated. Before this
patch, if you deleted all timelines from a tenant, its GC and
compaction loops were stopped, and the tenant went back to Idle
state. We no longer do that. The empty tenant stays Active. The
changes to test_tenant_tasks.py are related to that.
There's still plenty of synchronous code and blocking. For example, we
still use blocking std::io functions for all file I/O, and the
communication with WAL redo processes is still uses low-level unix
poll(). We might want to rewrite those later, but this will do for
now. The model is that local file I/O is considered to be fast enough
that blocking - and preventing other tasks running in the same thread -
is acceptable.
Seems a bit silly to have a separate crate just for the executable. It
relies on the control plane for everything it does, and it's the only
user of the control plane.
Previously, proxy didn't forward auxiliary `options` parameter
and other ones to the client's compute node, e.g.
```
$ psql "user=john host=localhost dbname=postgres options='-cgeqo=off'"
postgres=# show geqo;
┌──────┐
│ geqo │
├──────┤
│ on │
└──────┘
(1 row)
```
With this patch we now forward `options`, `application_name` and `replication`.
Further reading: https://www.postgresql.org/docs/current/libpq-connect.htmlFixes#1287.
Including, but not limited to:
* Fixes to neon management code to support walproposer-as-an-extension
* Fix issue in expected output of pg settings serialization.
* Show the logs of a failed --sync-safekeepers process in CI
* Add compat layer for renamed GUCs in postgres.conf
* Update vendor/postgres to the latest origin/main
The new format has a few benefits: it's shorter, simpler and
human-readable as well. We don't use base64 anymore, since
url encoding got us covered.
We also show a better error in case we couldn't parse the
payload; the users should know it's all about passing the
correct project name.
- Updated dependencies with "cargo update"
- Updated workspace_hack with "cargo hakari generate"
There's no particular reason to do this now, just a periodic refresh.
* ensure_server_config() function is added to ensure the server does not have background processes
which intervene with WAL generation
* Rework command line syntax
* Add `print-postgres-config` subcommand which prints the required server configuration
Previously, we were granting create only to db owner, but now we have a
dedicated 'web_access' role to connect via web UI and proxy link auth.
We anyway grant read / write all data to all roles, so let's grant
create to everyone too. This creates some provelege objects in each db,
which we need to drop before deleting the role. So now we reassign all
owned objects to each db owner before deletion. This also fixes deletion
of roles that created some data in any db previously. Will be tested by
https://github.com/neondatabase/cloud/pull/1673
Later we should stop messing with Postgres ACL that much.
Separate task is launched for each timeline and stopped when timeline doesn't
need offloading. Decision who offloads is done through etcd leader election;
currently there is no pre condition for participating, that's a TODO.
neon_local and tests infrastructure for remote storage in safekeepers added,
along with the test itself.
ref #1009
Co-authored-by: Anton Shyrabokau <ahtoxa@Antons-MacBook-Pro.local>
* Actual generation logic is in a separate crate `postgres_ffi/wal_generate`
* The create also provides a binary for debug purposes akin to `initdb`
* Two tests currently fail and are ignored
* There is no easy way to test this directly in Safekeeper as it starts restoring from commit_lsn.
So testing would require disconnecting Safekeeper just after it has received the WAL,
but before it is committed.
- Enabled process exporter for storage services
- Changed zenith_proxy prefix to just proxy
- Removed old `monitoring` directory
- Removed common prefix for metrics, now our common metrics have `libmetrics_` prefix, for example `libmetrics_serve_metrics_count`
- Added `test_metrics_normal_work`
