nfs client performance

[Dan Lund]

Unfortunately tcp is often necessary with netapp, and rsize/wsize is
set to 32k like he said.
I run a few Oracle servers with shares on our netapp.
We use tcp,noudp,rsize=32768,wsize=32768,hard,nointr

That's from memory of course.

We use rhel2.1/3/4 with netapp over gig-e.  For now... Soon will be fiber.

On 3/5/07, Craig White <craig at tobyhouse.com> wrote:
> 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>
>
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