Re: [PING] fallocate() causes btrfs to never compress postgresql files

From: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
To: Dimitrios Apostolou <jimis(at)gmx(dot)net>
Cc: Magnus Hagander <magnus(at)hagander(dot)net>, Tomas Vondra <tomas(at)vondra(dot)me>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Andres Freund <andres(at)anarazel(dot)de>, Melanie Plageman <melanieplageman(at)gmail(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, David Rowley <dgrowleyml(at)gmail(dot)com>
Subject: Re: [PING] fallocate() causes btrfs to never compress postgresql files
Date: 2025-10-30 03:55:29
Message-ID: CA+hUKGJQ=V4S-5Z=D6cDfsOz_7vGAAusj2b3fO36GuezcADamQ@mail.gmail.com
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On Wed, Oct 29, 2025 at 4:31 AM Dimitrios Apostolou <jimis(at)gmx(dot)net> wrote:
> Sorry to ping again, but was there a conclusion reached regarding adding the new file_extend_method setting?

No objections appeared, so the conclusion I am drawing is that we
should do this, and back-patch it into 17 for the upcoming release.
It is working as expected on my ZFS system in light testing. Rebasing
and figuring out where to add the missing documentation for last
chance review...

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