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Re: Debian / NFS

Devin Atencio, Mon, Mar 01, 2004 at 01:58:07PM -0700: 
> I currently have a NAS server running Debian Linux with kernel 2.4.22
> with XFS filesystem.  The NAS currently has 1.5 gigs of Memory and is a
> Dual Pentium III 1.4 gigahertz machine.  I have 4 machines that mount

What kind of storage does it have?

> this NAS for e-mail/pop services. The mail servers are normally under
> very heavy loads and I notice that the load on the NAS skyrockets
> causing lots of issues with pop3. I am almost positive it is NFS issues
> and am trying to figure out how to better tune the NFS on my NAS so i
> have less issues.
> I am using the nfs-kernel-server and I have in my
> /etc/defaults/nfs-kernel-server
> # Number of servers to start up RPCNFSDCOUNT=300
> My /proc/net/rpc/nfsd shows: th 300 6328317 437895.770 181412.220
> 96134.190 58149.750 38388.700 27054.990 20005.880 15421.700 12464.920
> 21369.570

We have seens similar problems before and eventually concluded that it was
a disk bandwidth problem rather than an nfs problem.  What does the load
look like on the nfs server?  What does iostat show you?

What does the retrans parameter in `nfsstat -c' show on the clients?


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