From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Jakob Oestergaard <jakob@unthought.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: bdflush/rpciod high CPU utilization, profile does not make sense
Date: Wed, 06 Apr 2005 17:28:56 -0400 [thread overview]
Message-ID: <1112822936.13304.44.camel@lade.trondhjem.org> (raw)
In-Reply-To: <20050406160123.GH347@unthought.net>
on den 06.04.2005 Klokka 18:01 (+0200) skreiv Jakob Oestergaard:
> What do I do?
>
> Performance sucks and the profiles do not make sense...
>
> Any suggestions would be greatly appreciated,
A look at "nfsstat" might help, as might "netstat -s".
In particular, I suggest looking at the "retrans" counter in nfsstat.
When you say that TCP did not help, please note that if retrans is high,
then using TCP with a large value for timeo (for instance -otimeo=600)
is a good idea. It is IMHO a bug for the "mount" program to be setting
default timeout values of less than 30 seconds when using TCP.
Cheers,
Trond
--
Trond Myklebust <trond.myklebust@fys.uio.no>
next prev parent reply other threads:[~2005-04-06 21:29 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-06 16:01 Jakob Oestergaard
2005-04-06 21:28 ` Trond Myklebust [this message]
2005-04-07 15:28 ` Jakob Oestergaard
2005-04-06 23:19 ` Greg Banks
2005-04-07 15:38 ` Jakob Oestergaard
2005-04-07 16:01 ` Greg Banks
2005-04-07 16:17 ` Trond Myklebust
2005-04-09 21:35 ` Jakob Oestergaard
2005-04-09 21:52 ` Trond Myklebust
2005-04-11 7:48 ` Jakob Oestergaard
2005-04-11 12:35 ` Trond Myklebust
2005-04-11 13:47 ` Jakob Oestergaard
2005-04-11 14:35 ` Trond Myklebust
2005-04-11 14:41 ` Jakob Oestergaard
2005-04-11 15:21 ` Trond Myklebust
2005-04-11 15:42 ` Jakob Oestergaard
2005-04-12 1:03 ` Greg Banks
2005-04-12 9:28 ` Jakob Oestergaard
2005-04-19 19:45 ` Jakob Oestergaard
2005-04-19 22:46 ` Trond Myklebust
2005-04-20 13:57 ` Jakob Oestergaard
2005-04-24 7:15 ` Jakob Oestergaard
2005-04-25 3:09 ` Trond Myklebust
2005-04-25 13:50 ` Jakob Oestergaard
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