Re: autovacuum launcher crash: assert in pgstat_count_io_op (IOOP_EXTEND on pg_database's VM)

From: Michael Paquier <michael(at)paquier(dot)xyz>
To: Ewan Young <kdbase(dot)hack(at)gmail(dot)com>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org, melanieplageman(at)gmail(dot)com
Subject: Re: autovacuum launcher crash: assert in pgstat_count_io_op (IOOP_EXTEND on pg_database's VM)
Date: 2026-06-01 04:08:38
Message-ID: ah0FxpCYeubtqX6A@paquier.xyz
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On Sun, May 31, 2026 at 12:36:45PM +0800, Ewan Young wrote:
> I haven't been able to boil this down to a clean standalone repro yet -- it
> seems to need the launcher to hit get_database_list() at the moment a
> pg_database page is prunable and the VM fork still has to grow -- but the
> path looks pretty clear from the stack.

My first suspicion would be something in the area of b46e1e54d078 and
some of the VM improvements. Melanie?
--
Michael

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