| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)iki(dot)fi> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Fix multixact members truncation at page boundary |
| Date: | 2026-09-16 12:30:35 |
| Message-ID: | E1x6omZ-00000000aPy-0Yaj@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
Fix multixact members truncation at page boundary
Like in PerformOffsetsTruncation() and e.g. in TruncateSUBTRANS(),
need to step back to previous page at page boundary, to avoid passing
a cutoff page to SimpleLruTruncate() that hasn't been created
yet. Otherwise you can get a bogus 'LOG: could not truncate directory
"pg_multixact/members": apparent wraparound' message in the log.
Reported-by: Noah Misch <noah(at)leadboat(dot)com>
Discussion: https://www.postgresql.org/message-id/20260827231757.78.noahmisch@microsoft.com
Backpatch-through: 19
Branch
------
REL_19_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/d8408e8d6823036bb88310b36eed8d9607220847
Modified Files
--------------
src/backend/access/transam/multixact.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
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