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help / color / mirror / Atom feedFrom: Heikki Linnakangas <[email protected]>
To: [email protected]
Subject: pgsql: Align PGPROC to cache line boundary
Date: Sun, 22 Feb 2026 11:14:59 +0000
Message-ID: <[email protected]> (raw)
Align PGPROC to cache line boundary
On common architectures, the PGPROC struct happened to be a multiple
of 64 bytes on PG 18, but it's changed on 'master' since. There was
worry that changing the alignment might hurt performance, due to false
cacheline sharing across elements in the proc array. However, there
was no explicit alignment, so any alignment to cache lines was
accidental. Add explicit alignment to remove worry about false
sharing.
Reviewed-by: Bertrand Drouvot <[email protected]>
Discussion: https://www.postgresql.org/message-id/[email protected]
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/412f78c66eedbe9cf41a657f4566d86a69ab7af2
Modified Files
--------------
src/include/storage/proc.h | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
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