users@glassfish.java.net

Re: Debugging Glassfish CPU usage

From: Jagadish Prasath Ramu <Jagadish.Ramu_at_Sun.COM>
Date: Tue, 24 Mar 2009 19:50:55 +0530

On Tue, 2009-03-24 at 15:11 +0100, Jeanfrancois Arcand wrote:
> Salut,
>
> Jagadish Prasath Ramu wrote:
> >
> >
> > On Tue, 2009-03-24 at 11:46 +0100, Jeanfrancois Arcand wrote:
> >> Salut,
> >>
> >> glassfish_at_javadesktop.org wrote:
> >
> >> Jagadish, do you know if this could be the issue or not? But for sure
> >> all Grizzly WorkerThread may gets locked by such call.
> > jstack_dump_2009-03-23_22:10:22.txt
> > I see 250 "httpWorkerThread-80*" threads of which 34 are used for
> > database.
>
> Hum, for that one:
>
> http://forums.java.net/jive/servlet/JiveServlet/download/56-59323-338654-8150/jstack_dump_2009-03-24_09:26:34.txt
>
> All Grizzly WorkerThread are locked.
When resizer (cleaner) is doing cleanup of the pool, all the connections
will be validated. This will make all the requesting threads to wait
till resizer completes its job. This is a temporary wait stage.

jstack_dump_2009-03-23_22:10:22.txt
For the above stack, only 34 out of 250 httpWorkerThreads are used by
database calls. So, what could be the issue ?

Thanks,
-Jagadish
>
> >
> > Lets wait for "rwillie" to provide more details, output based on the
> > proposed settings and see.
>
> Thanks!
>
> -- Jeanfrancois
>
>
> >
> > Thanks,
> > -Jagadish
> >
> >
> >> A+
> >>
> >> -- Jeanfrancois
> >>
> >>
> >>> Thanks!
> >>> [Message sent by forum member 'rwillie6' (rwillie6)]
> >>>
> >>> http://forums.java.net/jive/thread.jspa?messageID=338656
> >>>
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