From: Ben Gamari <bgamari.foss@gmail.com>
To: martin f krafft <madduck@madduck.net>,
"Aneesh Kumar K. V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Olly Betts <olly@survex.com>, notmuch@notmuchmail.org
Subject: Re: Notmuch performance (literally, in my case)
Date: Tue, 16 Mar 2010 12:18:39 -0700 (PDT) [thread overview]
Message-ID: <4b9fd98f.0c58560a.205a.0a38@mx.google.com> (raw)
In-Reply-To: <20100316180052.GA6600@piper.oerlikon.madduck.net>
On Tue, 16 Mar 2010 19:00:52 +0100, martin f krafft <madduck@madduck.net> wrote:
> I use ext4 with data=ordered, and while notmuch is writing the
> Xapian database, most I/O stalls on the machine:
>
> - Firefox does not get any mouse events
> - Vim blocks writing the viminfo file
> - All disk operations queue for multiple seconds.
>
> So no, ext4 is not a solution. Is it just me, or should no
> filesystem of this world be able to hog a system this badly? I think
> the culprit is the IO-scheduler.
>
In my uninformed opinion, I think it more likely that the dominant factor is
the page reclaim code. Even noop scheduling is pretty bad.
- Ben
next prev parent reply other threads:[~2010-03-16 19:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-15 5:59 Notmuch performance (literally, in my case) Ben Gamari
2010-03-15 9:04 ` Hans Dieter Pearcey
2010-03-15 9:29 ` Olly Betts
2010-03-15 17:29 ` Ben Gamari
2010-03-16 11:08 ` Olly Betts
2010-03-16 15:37 ` Ben Gamari
2010-03-16 17:10 ` Aneesh Kumar K. V
2010-03-16 17:22 ` Ben Gamari
2010-03-16 18:00 ` martin f krafft
2010-03-16 19:18 ` Ben Gamari [this message]
2011-07-28 17:29 ` martin f krafft
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