public inbox for linux-xfs@vger.kernel.org
 help / color / mirror / Atom feed
From: Anton A Vorobev <anton.vorobev@firma.seznam.cz>
To: xfs@oss.sgi.com
Subject: Slow seek in kernels >= 2.6.18
Date: Thu, 18 Oct 2007 10:12:28 +0200	[thread overview]
Message-ID: <4717156C.3030308@firma.seznam.cz> (raw)

Hi!

A question. We've got an application that runs about 30-40 minutes. 
After kernel upgrade from 2.6.17 branch, it runs about 3 hours.
I've made tests with the help of bonnie++, it shows that random seek 
operations are about 3 times slower in kernels newer than 2.6.18 in 
comparison with 2.6.17. This difference may be seen only during high 
load of a server. When it is in normal state, parameters are rather the 
same.

We use XFS filesystem. Does any one know may it be because of upgrade of 
XFS driver in kernel? Any ideas?

Thanks a lot.

______________________________________________________________
Anton Vorobev
Programátor
Seznam.cz, a.s. Radlická 608/2 150 00 Praha 5

tel.: +420 234 694 706
fax: +420 234 694 115
anton.vorobev@firma.seznam.cz
http://www.seznam.cz

             reply	other threads:[~2007-10-18  8:41 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-18  8:12 Anton A Vorobev [this message]
2007-10-18 10:15 ` Slow seek in kernels >= 2.6.18 Bhagi rathi
2007-10-18 18:21 ` {WHAT?} " Peter Grandi
2007-10-24  0:37 ` Josef Sipek

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4717156C.3030308@firma.seznam.cz \
    --to=anton.vorobev@firma.seznam.cz \
    --cc=xfs@oss.sgi.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox