amrd disk performance drop after running under high load
kris at FreeBSD.org
Fri Nov 9 09:34:16 PST 2007
Alexey Popov wrote:
> Kris Kennaway wrote:te:
>> In the "good" case you are getting a much higher interrupt rate but
>> with the data you provided I can't tell where from. You need to run
>> vmstat -i at regular intervals (e.g. every 10 seconds for a minute)
>> during the "good" and "bad" times, since it only provides counters and
>> an average rate over the uptime of the system.
> Now I'm running 10-process lighttpd and the problem became no so big.
> I collected interrupt stats and it shows no relation beetween
> ionterrupts and slowdowns. Here is it:
> Also I have similiar statistics on mutex profiling and it shows there's
> no problem in mutexes. http://22.214.171.124/gprof/mtx-graph/mtxgifnew/
> I have no idea what else to check.
> With best regards,
> Alexey Popov
I don't know what this graph is showing me :) When precisely is the
system behaving poorly?
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