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From Igor Cicimov <icici...@gmail.com>
Subject Re: Help in diagnosing server unresponsiveness
Date Fri, 01 Feb 2013 02:10:18 GMT
On 01/02/2013 12:37 PM, "Zoran Avtarovski" <zoran@sparecreative.com> wrote:
>
> Hi Guys,
>
> We have a application running on the latest Tomcat7 and we are getting a
> server crash or becoming unresponsive. This occur every few days at no
fixed
> intervals or time of day and they certainly don't correlate to any app
> function ­ at least not according to the logs.
>
> We set setup monitoring using JavaMelody and what we see is dramatic
spikes
> in CPU and memory usage at the time of the crash.
>
> Memory hovers around 3-5% for the rest of the time and CPU is the same.
>
> I've looked at the number of sessions, HTTP activity , jdbc activity and
> nothing obvious jumps out.
>
> I'd really appreciate your collective wisdom in putting into practice some
> strategies to identify the cause of the spikes. This driving me and my
team
> nuts.
>
> Any help would be appreciated.
>
> Z.
>
>
Take couple of thread dumps during the high cpu usage.

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