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From: Tom Lane <[email protected]>
To: Andres Freund <[email protected]>
Cc: [email protected]
Subject: Re: pgsql: aio: Infrastructure for io_method=worker
Date: Tue, 18 Mar 2025 18:53:48 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

Andres Freund <[email protected]> writes:
> To allow the number of IO workers to be increased without a restart, we need
> to reserve PGPROC entries for the workers unconditionally. This has been
> judged to be worth the cost. If it turns out to be problematic, we can
> introduce a PGC_POSTMASTER GUC to control the maximum number.

So I see this patch added 32 PGPROCs and hence 32 semaphores to the
system's requirements.  Unsurprisingly, this broke OpenBSD/NetBSD
again:

https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=sawshark&dt=2025-03-18%2016%3A20%3A05

It's probably time to just abandon the idea of being able to run with
only 60 semaphores.  I wonder though if we ought to revert 38da05346
and/or 6d0154196 in view of that.

			regards, tom lane

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