Re: degrading performance (NFS v.3 client)
- From: Trond Myklebust <trond.myklebust@xxxxxxxxxx>
- Date: Thu, 31 Jan 2008 17:44:33 -0500
On Thu, 2008-01-31 at 16:09 +0100, Claude Frantz wrote:
Hello !
Please allow me to submit to you a question related to a system which
is a NFS v3 client for a Netapp server. The home directories are
NFS attached. The following behaviour occurs sometimes. The system
becomes very slow. The load average is increasing but the most
interesting observation is the increase of the %iowait. After
reboot the system is running well for many days, then the problem
occurs again.
Any idea ?
Hi,
Have you tried analysing the NFS performances using Chuck's nfs-iostat
utility? You can pick up a copy at
http://oss.oracle.com/~cel/linux-2.6/2.6.24/
Try looking both at
nfs-iostat 10 --page
and
nfs-iostat 10 --attr
to see what the differences are between the 'fast' and 'slow' cases...
Cheers
Trond
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- From: Claude Frantz
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