What did you do before this kind of performance drop? Did you get the
latest java group PTF on your system?

Best regards.

Gavin, Zhang Gan --

IBM i J9 Team Lead,
Email: zhanggan@xxxxxxxxxx
Phone: +86-10-82452719
Address: 1/F, 28, ZhongGuanCun Software Park, No.8 Dong Bei Wang West
Road, Haidian District, Beijing P.R.China 100193
J9 on i: http://www.ibm.com/developerworks/ibmi/techupdates/java

From: "Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx>
To: "'java400-l@xxxxxxxxxxxx'" <java400-l@xxxxxxxxxxxx>
Date: 06/18/2015 09:09 PM
Subject: Java batch job performance issue
Sent by: "JAVA400-L" <java400-l-bounces@xxxxxxxxxxxx>

We are testing our first Java application.
V7R1 JDK 6.0 32 bit.
Sending 1,000,000 single requests in batch to a remote server.

This was a stress test.

Job was constantly taking 50% CPU, very little disk.

When started, job was doing 25 api calls per second, now it is 3 after
740,000 after 18 hours.
The heap size started at 30MB and is now roughly 600MB.

The job did not error, simply slowed down.
We cancelled at this point.

The process is called from an RPGLE pgm, Java is initialized in CLLE pgm.

Any thoughts?

Thank You
Paul Steinmetz
IBM i Systems Administrator

Pencor Services, Inc.
462 Delaware Ave
Palmerton Pa 18071

610-826-9117 work
610-826-9188 fax
610-349-0913 cell
610-377-6012 home


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