From: "Stephen C. Tweedie" <sct@redhat.com>
To: Matthew Kirkwood <matthew@hairy.beasts.org>
Cc: linux-mm@kvack.org, Mike Galbraith <mikeg@wen-online.de>,
Rik van Riel <riel@conectiva.com.br>
Subject: Re: Linux 2.2 vs 2.4 for PostgreSQL
Date: Wed, 7 Mar 2001 10:22:06 +0000 [thread overview]
Message-ID: <20010307102206.C7453@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.10.10103061626070.20708-100000@sphinx.mythic-beasts.com>; from matthew@hairy.beasts.org on Tue, Mar 06, 2001 at 07:36:23PM +0000
Hi,
On Tue, Mar 06, 2001 at 07:36:23PM +0000, Matthew Kirkwood wrote:
>
> Postgres is fairly fsync-happy.
Do you happen to know if it is using fsync, fdatasync or O_SYNC? I'm
seeing performance regressions on 2.4 fsync versus 2.2 which I'm
chasing right now, but fdatasync doesn't seem to have that problem
(and fdatasync is always preferable if you are updating a file in
place and you don't care about the mtime timestamp being 100%
uptodate).
Cheers,
Stephen
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next prev parent reply other threads:[~2001-03-07 10:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-06 19:36 Linux 2.2 vs 2.4 for PostgreSQL Matthew Kirkwood
2001-03-06 20:39 ` Rik van Riel
2001-03-06 20:56 ` Marcelo Tosatti
2001-03-06 22:02 ` Matthew Kirkwood
2001-03-07 7:25 ` Mike Galbraith
2001-03-07 10:22 ` Stephen C. Tweedie [this message]
2001-03-07 11:16 ` Matthew Kirkwood
2001-03-07 12:07 ` Stephen C. Tweedie
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