Horton

pg_buffercache: Fix memory allocation formula

Michael Paquier <michael@paquier.xyz>

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Commit: 580b5c2f397fbb2f74c2661cfe53203ed6acead0
Author: Michael Paquier <michael@paquier.xyz>
Date: 2025-12-11T05:11:25Z
Releases: 18.2 
pg_buffercache: Fix memory allocation formula

The code over-allocated the memory required for os_page_status, relying
on uint64 for its element size instead of an int, hence doubling what
was required.  This could mean quite a lot of memory if dealing with a
lot of NUMA pages.

Oversight in ba2a3c2302f1.

Author: David Geier <geidav.pg@gmail.com>
Discussion: https://postgr.es/m/ad0748d4-3080-436e-b0bc-ac8f86a3466a@gmail.com
Backpatch-through: 18

Files

PathChange+/−
contrib/pg_buffercache/pg_buffercache_pages.c modified +1 −1

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