Re: 2.4.18 knfsd load spikes

[Eric Whiting <ewhiting@amis.com>]

I see the load spikes as well. A ps shows the nfsd processes in the 'DW'
state. DW isn't bad, but when it sits there a long time then the load
jumps up. (could be disk or network related I think?) This seems similar
to what you describe here. Does the load average ramp up to the number
of nfsd threads?

eric


Jeff Smith wrote:
> 
> We are running ext2 filesystems on a Supermicro dual P3 with Serverworks HE
> chipset.  As best I can tell (which probably does not count for much), the CPU
> load comes from all the nfsd's holding off requests while waiting for a cache
> flush.  It happens whenever a particular job is run which slowly reads and
> extends a very large file.  When we suspend the job, every thing returns to
> normal.  When we resume the job, everything continues to run normally for a
> while, but soon begins to bog down the fileserver again.
> 
> Anyway, I hope you are right that you are experiencing a different problem.
> Scheduling downtime around here is difficult, but hopefully in the next few
> weeks I will be able to upgrade the fileservers to 2.4.18 (or 2.4.19?).  In the
> mean time, I'm trying to build a test machine to replicate the problem (and,
> hopefully, verify the fix).
>

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