Re: bdflush/rpciod high CPU utilization, profile does not makesense

From: Trond Myklebust
Date: Wed Apr 06 2005 - 16:31:26 EST

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.


Trond Myklebust <trond.myklebust@xxxxxxxxxx>

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