| From: | Masahiko Sawada <msawada(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Use LW_SHARED in walsummarizer.c for WALSummarizerLock lock wher |
| Date: | 2025-08-29 00:08:00 |
| Message-ID: | E1urmeu-0029Cu-1B@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
Use LW_SHARED in walsummarizer.c for WALSummarizerLock lock where possible.
Previously, we used LW_EXCLUSIVE in several places despite only reading
WalSummarizerCtl fields. This patch reduces the lock level to LW_SHARED
where we are only reading the shared fields.
Backpatch to 17, where wal summarization was introduced.
Reviewed-by: Nathan Bossart <nathandbossart(at)gmail(dot)com>
Discussion: https://postgr.es/m/CAD21AoDdKhf_9oriEYxY-JCdF+Oe_muhca3pcdkMEdBMzyHyKw@mail.gmail.com
Backpatch-through: 17
Branch
------
REL_17_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/00064302cbf2736d8eaf27ac068328981c6b0212
Modified Files
--------------
src/backend/postmaster/walsummarizer.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
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