From: Melanie Plageman <melanieplageman@gmail.com>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Save vmbuffer in heap-specific scan descriptors for on-access pr
Date: Sun, 15 Mar 2026 15:11:24 +0000
Message-ID: <E1w1n7j-000IV8-09@gemulon.postgresql.org> (raw)
Save vmbuffer in heap-specific scan descriptors for on-access pruning
Future commits will use the visibility map in on-access pruning to fix
VM corruption and set the VM if the page is all-visible.
Saving the vmbuffer in the scan descriptor reduces the number of times
it would need to be pinned and unpinned, making the overhead of doing so
negligible.
Author: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/C3AB3F5B-626E-4AAA-9529-23E9A20C727F%40gmail.com
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/99bf1f8aa6cd8029cb9ce17d4a804eed386bec97
Modified Files
--------------
src/backend/access/heap/heapam.c | 12 +++++++++++-
src/backend/access/heap/heapam_handler.c | 12 ++++++++++--
src/backend/access/heap/pruneheap.c | 6 +++++-
src/include/access/heapam.h | 19 ++++++++++++++++---
4 files changed, 42 insertions(+), 7 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: melanieplageman@gmail.com, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Save vmbuffer in heap-specific scan descriptors for on-access pr
In-Reply-To: <E1w1n7j-000IV8-09@gemulon.postgresql.org>
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