jasper 471 on Websphere 7/AIX

[martin2kp138]

We have jasper 471 on Websphere 7.0 and AIX operating system.

Can some body let me know the generic JVM arguments to be set.

Should i set the verbose garbage collection to be on.

We had couple of occurences where the jvm ran out of memory.

 

 

[mgeise]

There are some JVM options described in section 6.2 of the installation guide that are specific to Tomcat/JBoss, but they should give you a good idea for Websphere as well.  You will need to tune based on the IBM JVM that comes with websphere, but the key setting for garbage collection are:

-XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled

In addition, you will want to play with the amount of memory allocated to both your min/max heap size as well as the PermSize/MaxPermSize.

[martin2kp138]

thanks for the reply. Currently the jvm argument is set as

 

-XX:PermSize=32m -XX:MaxPermSize=128m -Xss2m -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled

 

min/max heap size is set as 256/1024 mb

 

and verbose garbage collection is enabled.