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From: Masahiko Sawada <[email protected]>
To: Sami Imseih <[email protected]>
Cc: Alexander Lakhin <[email protected]>
Cc: pgsql-hackers <[email protected]>
Cc: Daniil Davydov <[email protected]>
Subject: Re: test_autovacuum/001_parallel_autovacuum is broken
Date: Thu, 9 Apr 2026 12:40:55 -0700
Message-ID: <CAD21AoBte7CSVRpnOvXibYPsqOE9aswsp7jrQW+8fhwxRZFWpg@mail.gmail.com> (raw)
In-Reply-To: <CAA5RZ0uqvjxv5HPzz36UEq-LUf8F+kae61k0imaGw0C0XGa7nw@mail.gmail.com>
References: <CAA5RZ0s+kZZRMSF4HW7tZ9W2jS1o4B+Fg8dr5a-T6mANX+mdQA@mail.gmail.com>
	<[email protected]>
	<CAD21AoCj=OSxoh3RBw0VWJ7Y7c9EipRhpatcZaHuXKGLWyKgdQ@mail.gmail.com>
	<CAA5RZ0uqvjxv5HPzz36UEq-LUf8F+kae61k0imaGw0C0XGa7nw@mail.gmail.com>

On Thu, Apr 9, 2026 at 11:32 AM Sami Imseih <[email protected]> wrote:
>
> > The root cause seems to me that it's not guaranteed that we can see
> > the autovacuum logs after checking the statistics (i.e.,
> > pg_stat_user_tables) as we update the statistics and then write the
> > log.
> >
> > One way to fix the test is to replace log_contains() with
> > wait_for_log(). We can also remove wait_for_autovacuum_complete()
> > logic altogether.
>
> +1. I was going to reply with exactly this. Attached is the fix.

Thank you for the patch! I agree with the overall idea. Since we
enable autovacuum log only the test_autovac table, just checking
autovacuum log works as expected.

I think we can simplify the test further by removing the logic around
the av_count variable.

Regards,

-- 
Masahiko Sawada
Amazon Web Services: https://aws.amazon.com





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