>
>
> On 07/21/14 19:59, Ian Chapman wrote:
> > Nfsstat, wireshark and the system logs do not show anything which screams
> > there's a problem.
> >
> > The network card in the client machine and the server shows no collisions,
> > dropped packets, frame overruns etc.
> >
> > I've tested with the export that isn't using Kerberos and still have the
> > same issue. Messing with the rsize, wsize, async, sync parameters makes no
> > difference either.
> >
> > The server has 32GB RAM, the client 16GB.
> >
> > For all intents and purpose it looks like its working as it should, it's
> > just painfully slow.
> >
> > Any NFS gurus out there, that can tell me what I'm doing wrong?
>
> I've been using NFSv4 extensively for several years and I've not had an issue
> that you
> describe where everything is fine and then suddenly performance goes to hell
> in a hand basket.
>
> It sounds as if you only have 2 systems to work with? No, tiebreaker so to
> speak?
>
> Have you considered running a VM on your client system to see if it is
> affected in the same way?
>
DNS problems can do it . Are your /etc/resolv.conf files correct ?
You could try running your own nameserver ( dnsmasq ) if the upstream
one is too slow or too busy.
peter
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