Re: Track skipped tables during autovacuum and autoanalyze

On Wed, Mar 25, 2026 at 01:28:47AM +0900, Yugo Nagata wrote:
> Although the timestamps are overwritten on each skipped autovacuum or
> autoanalyze, they still indicate when the last attempt was made. This
> can help users confirm that autovacuum is actively attempting to run,
> and that the issue is due to repeated skips rather than inactivity.
>
> While counters can indicate overall activity, they do not reveal when
> the last skip occurred. With timestamps, users can immediately see the
> most recent attempt, even without a separate dashboard or historical
> tracking.
>
> Therefore, counters are useful for monitoring overall activity, but
> timestamps give additional, complementary information, so it seems
> worthwhile to include them too.

Hmm.. I can buy this argument for the timestamps, especially for
database with many relations of various sizes that could take a
various amount of time to process. The timestamps could offer hints
about the time it takes between the skips, even if snapshots of the
stats data are not taken at a very aggressive frequency.

This is v20 material at this stage, of course..
--
Michael