amrd disk performance drop after running under high load

Kris Kennaway kris at
Fri Nov 9 09:36:36 PST 2007

Alexey Popov wrote:
> Hi.
> 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.
> 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?

freebsd-hackers at mailing list
To unsubscribe, send any mail to "freebsd-hackers-unsubscribe at"

More information about the freebsd-stable mailing list