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cargo-test: Unflake in CI #34592

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def- merged 1 commit into from
Jan 5, 2026
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cargo-test: Unflake in CI #34592

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10 changes: 5 additions & 5 deletions ci/test/cargo-test/mzcompose.py
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Original file line number Diff line number Diff line change
Expand Up @@ -351,10 +351,6 @@ def worker() -> None:
for p in metadata["packages"]
if p["name"] not in ("mz-environmentd", "mz-balancerd")
]
test_threads = multiprocessing.cpu_count() * 2
# Slower test runs, give them more resources to have less contention
if c.metadata_store() == "cockroach":
test_threads //= 2

spawn.runv(
[
Expand All @@ -366,7 +362,11 @@ def worker() -> None:
"--all-features",
"--profile=ci",
"--cargo-profile=ci",
f"--test-threads={test_threads}",
# Be careful about raising this since it will cause
# contention in cargo test when running against CRDB
# for tagged builds. Also increases test flakiness in
# general.
f"--test-threads={multiprocessing.cpu_count()}",
*(
(
pkgs
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