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Re: Add pg_stat_autovacuum_priority

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Alexander Lakhin <exclusion@gmail.com>, Sami Imseih <samimseih@gmail.com>, Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>, Robert Treat <rob@xzilla.net>, satyanarlapuram@gmail.com, pgsql-hackers <pgsql-hackers@postgresql.org>, tndrwang@gmail.com
Date: 2026-04-08T21:19:57Z
Lists: pgsql-hackers

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On Wed, Apr 08, 2026 at 03:21:38PM -0400, Tom Lane wrote:
> Nathan Bossart <nathandbossart@gmail.com> writes:
>> FWIW that elog() shouldn't be emitting anything from the view, unless
>> something is broken.
> 
> [ looks again... ]  Oh, you mean because pg_stat_get_autovacuum_scores
> passes 0 for elevel instead of any of the valid elevel constants.
> Can you say "undocumented cowboy hack"?  I'd be happier if we added
> something like "#define LOG_NEVER 0  /* Never emit this message */"
> to elog.h and used that.

Yeah... I should've done that originally.  Here's a patch that I'll apply
in the next day or so, barring objections.

-- 
nathan

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 double-free in pg_stat_autovacuum_scores.

  2. Add LOG_NEVER error level code.

  3. Add pg_stat_autovacuum_scores system view.

  4. Remove recheck_relation_needs_vacanalyze().

  5. Add elevel parameter to relation_needs_vacanalyze().

  6. Teach relation_needs_vacanalyze() to always compute scores.

  7. Refactor relation_needs_vacanalyze().

  8. Add rudimentary table prioritization to autovacuum.

  9. Fix per-relation memory leakage in autovacuum.

  10. Fix recently-understood problems with handling of XID freezing, particularly