Re: another autovacuum scheduling thread

From: Nathan Bossart <nathandbossart(at)gmail(dot)com>
To: wenhui qiu <qiuwenhuifx(at)gmail(dot)com>
Cc: Sami Imseih <samimseih(at)gmail(dot)com>, David Rowley <dgrowleyml(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Jeremy Schneider <schneider(at)ardentperf(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: another autovacuum scheduling thread
Date: 2025-10-29 15:58:14
Message-ID: aQI5lnTL-AJd3de-@nathan
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On Wed, Oct 29, 2025 at 11:10:55AM +0800, wenhui qiu wrote:
> Typically, DBAs avoid setting autovacuum_freeze_max_age too close to
> vacuum_failsafe_age. Therefore, your logic most likely uses the
> vacuum_failsafe_age value.
> Would taking the average of the two be a better approach?

That approach would begin aggressively scaling the priority of tables
sooner, but I don't know if that's strictly better. In any case, I'd like
to avoid making the score calculation too magical.

--
nathan

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