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Search for SLRU page only in its own bank

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One of the two slot scans in SlruSelectLRUPage was not walking only the
slots in the specific bank where the buffer could be; change it to do
that.

Oversight in 53c2a97a9266.

Author: Sergey Sargsyan <sergey.sargsyan.2001@gmail.com>
Discussion: https://postgr.es/m/18582-5f301dd30ba91a38@postgresql.org
This commit is contained in:
Alvaro Herrera 2024-08-18 20:49:57 -04:00
parent 2793acecee
commit 7b063ff26a
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GPG Key ID: 1C20ACB9D5C564AE
1 changed files with 1 additions and 1 deletions
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src/backend/access/transam/slru.c
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@ -1184,7 +1184,7 @@ SlruSelectLRUPage(SlruCtl ctl, int64 pageno)
Assert(LWLockHeldByMe(SimpleLruGetBankLock(ctl, pageno)));
/* See if page already has a buffer assigned */
for (int slotno = 0; slotno < shared->num_slots; slotno++)
for (int slotno = bankstart; slotno < bankend; slotno++)
{
if (shared->page_status[slotno] != SLRU_PAGE_EMPTY &&
shared->page_number[slotno] == pageno)