out of memory issues on IBM AIX and IBM JDK 1.4.2 J9 version

[Former Member]

Hi,

We are having out of memory issue on IBM AIX 5.3 version and IBM JDK 1.4.2 J9. All the settings for jvm parameters have been

made as per sap recommendations. Now that we need to debug this issue using some java profiler tool. We tried using Sherlok

but this does't seem to work on AIX platform. SAP Memory analyzer is a great tool but unfortunately is not supported with IBM

JDK.

so what is the best way to troubleshoot out of memory heap issues ? which tools needs to be used for ibm platform and ibm jdk

?

[Former Member]

Hi sap geek,

The IBM JVM is a different implementation than the SUN JVM, which basically means that you have to use IBM tools to perform any analysis.

The following SDN article describes how to analyse OOM problems with the IBM heap analyzer tool;

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/80ec1d6e-dc6f-2910-8fa3-bd7b5480...

The tool itself can be downloaded from;

http://www.alphaworks.ibm.com/tech/heapanalyzer

Which version of the IBM JVM 1.4.2 (J9) are you using? Which SAP system are you running on it, and how is the system being used (how many users?)

Cheers,

Walter

[Former Member]

Hai,

Better check it out by using the Configtool and go through some SAPnotes like723909 and also related to IBM.

so what is the best way to troubleshoot out of memory heap issues ? which tools needs to be used for ibm platform and ibm jdk -

---

> check with Wily Introscope

Introscope�� is a system management application created to manage Java Application

performance. Unlike development tools, Introscope�� is designed to scale with minimal

performance impact. This allows you to monitor and manage your application performance

in live production environments.

You are installing Introscope as part of SAP Solution Manager to give SAP support better

visibility into technical issues you may experience. You will also get access to Introscope so

that you can analyze performance problems on your own.

Thanks and Regards,

[Former Member]

Pls paste logs from

dev_jcontrol

dev_server0

dev_dispatcher

dev_bootstrap

and also the JVM parameters

[Former Member]

Hello sap geek,

Could you please post here the content of dev_server0? And also the content of std_server0.out from the moment when you receive the OOM error.

Best regards,

Rafael Toshiaki

PS: Please consider rewarding points for helpful answers on SDN.

[Former Member]

Hi,

You can check out by server log which application is causing memory dump or which is the application which is using jdk and when starts, gives memory problem.

Regards,

Piyush