Re: NFS server not responding

[Douglas Furlong <douglas.furlong@firebox.com>]

On Thu, 2003-11-27 at 16:30, Trond Myklebust wrote:
> >>>>> " " == Douglas Furlong <douglas.furlong@firebox.com> writes:
> 
>      > Good day all.  I am running in to excessive amounts of NFS
>      > errors as below.
> 
>      > kernel: nfs: server neon not responding, still trying kernel:
>      > nfs: server neon OK
> 
> Two suggestions:
> 
>  1) Bump the number of threads on the server. 32 is probably a bit
>     low.

I have upped this to 64 now. Is there a rule of thumb with regards to
the number of people connecting/amount of system resources?

>  2) The value retrans=3 used as the default by the Linux 'mount'
>     program is rather low compared to that used on other OSes. I
>     suggest you bump it to at least 5 on all your clients.

I have increased the retrans value to 10 now. This appears to have
resolved the problems to a greater extent.

What sort of things would be causing the client to have to re-transmit
so often?

Client rpc stats:
calls      retrans    authrefrsh
3431978    15968      0    

Those retrans numbers, as a percentage of the calls, does it seem
appropriate?

Thanks for the tips.

Doug



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