From 2d536c4851fccf6eb4d8cf12d158641432fa3800 Mon Sep 17 00:00:00 2001 From: Alexey Makhmutov Date: Thu, 23 Apr 2026 17:54:20 +0300 Subject: [PATCH] Use PageGetHeapFreeSpace in heap_xlog_visible. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Free space in regular heap pages need to be calculated using PageGetHeapFreeSpace rather than PageGetFreeSpace. This is required to take into account the MaxHeapTuplesPerPage limit, otherwise page may be marked as having free space while it’s impossible to add any new row to it. --- src/backend/access/heap/heapam.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/backend/access/heap/heapam.c b/src/backend/access/heap/heapam.c index a2c2745d148..19739390bd9 100644 --- a/src/backend/access/heap/heapam.c +++ b/src/backend/access/heap/heapam.c @@ -9232,7 +9232,7 @@ heap_xlog_visible(XLogReaderState *record) if (BufferIsValid(buffer)) { - Size space = PageGetFreeSpace(BufferGetPage(buffer)); + Size space = PageGetHeapFreeSpace(BufferGetPage(buffer)); UnlockReleaseBuffer(buffer); -- 2.54.0