| From: | Alexander Korotkov <akorotkov(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Fix checkpointer shared memory allocation |
| Date: | 2025-08-07 11:59:46 |
| Message-ID: | E1ujzHd-001Dkj-1n@gemulon.postgresql.org |
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| Thread: | |
| Lists: | pgsql-committers |
Fix checkpointer shared memory allocation
Use Min(NBuffers, MAX_CHECKPOINT_REQUESTS) instead of NBuffers in
CheckpointerShmemSize() to match the actual array size limit set in
CheckpointerShmemInit(). This prevents wasting shared memory when
NBuffers > MAX_CHECKPOINT_REQUESTS. Also, fix the comment.
Reported-by: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Discussion: https://postgr.es/m/1439188.1754506714%40sss.pgh.pa.us
Author: Xuneng Zhou <xunengzhou(at)gmail(dot)com>
Co-authored-by: Alexander Korotkov <aekorotkov(at)gmail(dot)com>
Branch
------
REL_18_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/5cfbff48a4fdd1437ff06fcebdc2dade477ed4b8
Modified Files
--------------
src/backend/postmaster/checkpointer.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
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