| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: pgsql: aio: Infrastructure for io_method=worker |
| Date: | 2025-03-18 22:53:48 |
| Message-ID: | 593800.1742338428@sss.pgh.pa.us |
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| Lists: | pgsql-committers pgsql-hackers |
Andres Freund <andres(at)anarazel(dot)de> 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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