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help / color / mirror / Atom feedFrom: Melanie Plageman <melanieplageman@gmail.com>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Update FSM after updating VM on-access
Date: Fri, 10 Jul 2026 22:21:27 +0000
Message-ID: <E1wiJb4-000VZI-2s@gemulon.postgresql.org> (raw)
Update FSM after updating VM on-access
b46e1e54d078de allowed setting the VM while on-access pruning, but it
neglected to update the freespace map. Once the page was all-visible,
vacuum could skip it, leading to stale freespace map values and,
effectively, bloat. Fix it by updating the FSM if we updated the VM.
Author: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Andrey Borodin <x4mmm@yandex-team.ru>
Discussion: https://postgr.es/m/flat/CAAKRu_b2StZrEC%3DHmW8LePuQbczyFRnfs8qTAJwn_%3DW76-y24w%40mail.gmail.com
Backpatch-through: 19
Branch
------
REL_19_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/e9eaeb04248a8b2cc977440caa1b72174c108c14
Modified Files
--------------
src/backend/access/heap/pruneheap.c | 26 +++++++++++++++++++++++---
1 file changed, 23 insertions(+), 3 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: melanieplageman@gmail.com, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Update FSM after updating VM on-access
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