Horton

Re: postmaster uses more CPU in 18 beta1 with io_method=io_uring

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Andres Freund <andres@anarazel.de>, MARK CALLAGHAN <mdcallag@gmail.com>, pgsql-hackers@lists.postgresql.org, Heikki Linnakangas <hlinnaka@iki.fi>, Tomas Vondra <tomas@vondra.me>
Date: 2025-06-05T20:01:07Z
Lists: pgsql-hackers 
On Thu, Jun 05, 2025 at 12:47:52PM -0400, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
>> I think this is a big enough pitfall that it's, obviously assuming the patch
>> has a sensible complexity, worth fixing this in 18. RMT, anyone, what do you
>> think?
> 
> Let's see the patch ... but yeah, I'd rather not ship 18 like this.

+1, I see no point in waiting for v19, especially since all of this stuff
is new in v18, anyway.

-- 
nathan

Commits

  1. aio: Combine io_uring memory mappings, if supported