ci: cap build jobs and disable incremental in backend tests to prevent OOM (#10118)

2026-09-12 00:06:14 +00:00 · 2026-07-15 09:50:16 +02:00
parent 6d1e12d5e9
commit eb7a2e048b
1 changed files with 13 additions and 1 deletions
@@ -245,7 +245,19 @@ jobs:
          RUST_LOG: "off"
          RUST_LOG_STYLE: never
          CARGO_NET_GIT_FETCH_WITH_CLI: true
-          CARGO_BUILD_JOBS: 12
+          # Cap parallel rustc/link jobs below the 16 available cores. The tail of
+          # the build links ~128 full-graph test binaries (one per tests/*.rs file
+          # across the workspace); at high parallelism enough heavy codegen+link
+          # units (rustc ~2.6GB, mold ~1GB each) overlap to exhaust the 64GB
+          # runner. Matches backend-test-windows.yml, which already uses 8.
+          CARGO_BUILD_JOBS: 8
+          # Incremental compilation is per-run dead weight in CI: rust-cache
+          # (cache-workspaces above) restores compiled dependency artifacts but
+          # never persists target/**/incremental, so there is no prior state to
+          # reuse in a one-shot `cargo test`. It only adds per-crate memory
+          # overhead and extra disk. Off here (kept on for local dev via
+          # .cargo/config.toml). Matches backend-test-windows.yml.
+          CARGO_INCREMENTAL: "0"
          # backend/Cargo.toml leaves profile.dev at the default debug = 2 for
          # the (large) windmill workspace crates; that debug info is emitted
          # into every object file and embedded in each test binary. Across the