Re: analysis of QJVACMDSRV? -- JAVA400-L

K,

you may be able to use a TPROF trace and PTDV to achieve what you want.

We have used that before to trace what is happening in websphere when
performance has gone doo-lally.

Search for "Collecting and analyzing an IBM iSeries TPROF trace" in Google,
that will point you to a IBM white paper PDF that describes how to set it
up, and import the data into PTDV.

Once you get used to looking at the data, it will take you right down to the
class/method/statement level, so you can determine where in your code the
performance is being chewed up

cheers
Colin.W



On 10/10/06, Raikov, Leonid <RaikovL1@xxxxxxxxx> wrote:


I do know of a nice Java tracing tool for System i, but I don't think I
can
advertise it in the list. Please contact me offline for the details.

There is obviously JobWatcher from IBM, but it's not easy to use.

Lo

Best Regards,

Leonid

Leonid Raikov
Principal Consultant
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Misys Banking Systems
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T +44 (0)1753 708 053
M +44 (0)7903 181 030
raikovl1@xxxxxxxxx

www.misys.com
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-----Original Message-----
From: TitanRebel [mailto:titanrebel@xxxxxxxxxxx]
Sent: 10 October 2006 00:14
To: Java Programming on and around the iSeries / AS400
Subject: analysis of QJVACMDSRV?


We are running Tomcat 4.1 on the iSeries under 1.3 JVM.  I have a
problem with QJVACMDSRV periodically taking up large amounts of CPU for
an extended period of time.  Usually, when this happens, and I try to
end the job, it goes into a THDW status for an extended period of time.
In WRKSYSACT it seems to be several different threads contributing to
the problem.

Is there a tool that I can use to analyze what is causing the problem?
Thanks for any info. you can give me to help figure it out.

K. Kennedy
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