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Re: BUG #18146: Rows reappearing in Tables after Auto-Vacuum Failure in PostgreSQL on Windows

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Michael Paquier <michael@paquier.xyz>
Cc: Thomas Munro <thomas.munro@gmail.com>, Heikki Linnakangas <hlinnaka@iki.fi>, Alexander Lakhin <exclusion@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Laurenz Albe <laurenz.albe@cybertec.at>, rootcause000@gmail.com, pgsql-bugs@lists.postgresql.org
Date: 2024-11-14T15:51:45Z
Lists: pgsql-bugs 
On Tue, Oct 29, 2024 at 3:49 AM Michael Paquier <michael@paquier.xyz> wrote:
> Don't you think that we'd better have a regression test on HEAD at
> least?  It should not be complicated.  I can create one if you want,
> perhaps for later if we want to catch the next minor release train.

I took a look at v4-0001 today and I think it looks fine. While I'm
not opposed to adding a test case, I think it's more important to fix
the bug at this point than to wait longer for a test case to show up.

I do wonder whether the new smgrtruncatefrom() should be used
everywhere instead of just from one of the call sites, but even if
that's desirable long-term, doing this much is still a lot better than
doing nothing. This data corrupting bug has been known and understood
for more than 4 years at this point.

-- 
Robert Haas
EDB: http://www.enterprisedb.com

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Fix C error reported by Oracle compiler.

  2. Restore smgrtruncate() prototype in back-branches.

  3. Fix corruption when relation truncation fails.

  4. RelationTruncate() must set DELAY_CHKPT_START.

  5. WAL-log inplace update before revealing it to other sessions.

  6. Fix bugs in MultiXact truncation

  7. Fix possible recovery trouble if TRUNCATE overlaps a checkpoint.