What the developer wrote
Authored by will
ci: bump CCACHE_MAXSIZE to 2G
With 15 runners we get 150GB of cache space to use, and we currently
have 18 jobs using ccache.
Although each run only generates ~ 200-300 MB of cache data on each run,
the small the small size may be contributing to poor hitrate.
Bump ccache to 2GB per job ~ --> 36GB of the total 150GB cache space to
try and reduce any thrashaing and generally increase hitrate.
What changed, and why it matters
This commit simply increases the maximum size of a build-speed cache used during automated testing, from 500 megabytes to 2 gigabytes per job. It only affects the project's own continuous-integration (CI) build environment and has no security relevance for Bitcoin Core users or the network.
No security action needed. This is a benign CI configuration change.
Security signals we found
No strong security signals were identified.
Evidence from the diff
The change updates the default CCACHE_MAXSIZE environment variable in ci/test/00_setup_env.sh from 500M to 2G. ccache is a compiler cache that stores object files to speed up rebuilds; it does not alter compiled output semantics, runtime behavior, or consensus code. The commit is purely an infrastructure/performance tuning adjustment.
Changed components
ci/test/00_setup_env.shInspect captured patch +1 / −1
diff --git a/ci/test/00_setup_env.sh b/ci/test/00_setup_env.sh
index bbe9515f..8d9a16ab 100755
--- a/ci/test/00_setup_env.sh
+++ b/ci/test/00_setup_env.sh
@@ -48,7 +48,7 @@ export RUN_FUZZ_TESTS=${RUN_FUZZ_TESTS:-false}
export BOOST_TEST_RANDOM=${BOOST_TEST_RANDOM:-1}
# See man 7 debconf
export DEBIAN_FRONTEND=noninteractive
-export CCACHE_MAXSIZE=${CCACHE_MAXSIZE:-500M}
+export CCACHE_MAXSIZE=${CCACHE_MAXSIZE:-2G}
export CCACHE_TEMPDIR=${CCACHE_TEMPDIR:-/tmp/.ccache-temp}
export CCACHE_COMPRESS=${CCACHE_COMPRESS:-1}
# The cache dir.
Why this scored 15/100
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