pgsql: ci: macos: Reduce test concurrency - Mailing list pgsql-committers

ci: macos: Reduce test concurrency

Test performance regresses noticably when using all cores. This is more
pronounced with meson than with autoconf, presumably because meson will
schedule the "full number" of tests more consistently.  8 seems to work
OK.

Discussion: https://postgr.es/m/20220927040208.l3shfcidovpzqxfh@awork3.anarazel.de
Backpatch: 15-, where CI was introduced

Branch
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REL_15_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/b507a7a19b5d9a8ed2500c5a7159353e02846901

Modified Files
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.cirrus.yml | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)