nfs client performance

[Craig White]

On Mon, 2007-03-05 at 14:36 -0700, David wrote:
> I'm in need of some help.  I have a rhel4 server mounting an nfs share on 
> a NetApp filer that is having some serious performance issues.  Not being 
> overly familiar with troublshooting nfs, I'm at a wall.  Here are the 
> details:
> 
> Previous server:
> Dell 2650, rhel3, kernel 2.4.something
> - no issues
> 
> Current server:
> Dell 2850, rhel4, kernel 2.6.9
> - gig network, e1000 module
> - rpciod cpu usage is very high.
> 
> here are my nfs mount options:
> filer:/vol/exportvol /local/dir    nfs 
> tcp,noatime,rsize=32768,wsize=32768,nfsvers=3,hard,intr 0 0
> 
> I've been trying to read up on nfs and performance monitoring. Hell, I've 
> even ran a few benchmarks.  Here's the problem.  I don't know how to 1) 
> read the results and 2) interpret the results to find a solution.
> 
> Yes, been reading the nfs performance howto.  Yes, been googling my hiney 
> off.  Yes, still flumoxed.
----
You don't give us enough details to do anything much more than guess but
I am curious what is meant by rpciod cpu usage is very high thinking
that it might have something to do with this issue.

I don't often detail things such as noatime, rsize, wsize, hard (in
fact, I haven't used hard nfs mounts as I seemed to recall some hanging
issues.

Craig

-- 
Craig White <craig at tobyhouse.com>