Re: another autovacuum scheduling thread

From: Jim Nasby <jnasby(at)upgrade(dot)com>
To: Nathan Bossart <nathandbossart(at)gmail(dot)com>
Cc: Sami Imseih <samimseih(at)gmail(dot)com>, Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>, David Rowley <dgrowleyml(at)gmail(dot)com>, Greg Burd <greg(at)burd(dot)me>, Robert Haas <robertmhaas(at)gmail(dot)com>, Robert Treat <rob(at)xzilla(dot)net>, Jeremy Schneider <schneider(at)ardentperf(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: another autovacuum scheduling thread
Date: 2026-03-23 22:27:31
Message-ID: CAMFBP2q-oMzpEua9Hdcpag15VGZn7aEO-uaHZ4yVEO_HCm55_Q@mail.gmail.com
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On Mon, Mar 23, 2026 at 4:01 PM Nathan Bossart <nathandbossart(at)gmail(dot)com>
wrote:

> On Mon, Mar 23, 2026 at 02:01:22PM -0500, Sami Imseih wrote:
> > Adding a system view will be nice. I am attaching a version I used in
> earlier
> > testing (cleaned up with docs), if we are inclined to get this in. I
> > think it will be
> > useful.
>
> Thanks. IMHO we should continue to focus on the main patch and get that
> committed first.
>

+1 ... for one thing if we're going to add a view meant for monitoring
autovac decisions I'd like to think about ways to measure how many tables
are "close" to being eligible for autovac. In particular, the scenario
where you've just done an MVU via some form of logical, so now the freeze
ages on all your tables are extremely similar.

It might be nice if we had an official means of publishing things that
we'd really like users to kick the tires on, but hold a clear understanding
that we promise no backwards compatibility, promise we'll keep supporting,
etc. I can't see how that'd work with backend code, but could certainly be
done for anything in userspace.

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