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Fix caclulation of LFC used_pages (#11095)

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## Problem

Async prefetch in LFC PR cause incorrect calculation of LFC
`used_pages`when page is overwritten

## Summary of changes

Decrement `used_pages` is page is overwritten.

---------

Co-authored-by: Konstantin Knizhnik <knizhnik@neon.tech>
Co-authored-by: Matthias van de Meent <matthias@neon.tech>
This commit is contained in:
Konstantin Knizhnik
2025-03-10 20:28:55 +02:00
committed by GitHub
parent bc052fd0fc
commit fb1957936c
1 changed files with 3 additions and 1 deletions
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4
pgxn/neon/file_cache.c
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@@ -1195,9 +1195,11 @@ lfc_writev(NRelFileInfo rinfo, ForkNumber forkNum, BlockNumber blkno,
state = GET_STATE(entry, chunk_offs + i);
if (state == PENDING) {
SET_STATE(entry, chunk_offs + i, REQUESTED);
} else if (state != REQUESTED) {
} else if (state == UNAVAILABLE) {
SET_STATE(entry, chunk_offs + i, PENDING);
break;
} else if (state == AVAILABLE) {
break;
}
if (!sleeping)
{