hwo to set JVM in websphere.

See this WAS v8.5 InfoCenter article on configuring the WAS JVM -> bit.ly/13ifsWA

You can set JVM parameters through wsadmin or the WAS admin console

thank you paul.

Hi Saravana,

   The initial heap size and maximum heap size for a JVM can be set using wsadmin scripting. I feel wsadmin takes less time to execute and also more reliable.

   To do this, go to WAS_PROFILE_ROOT/bin and launch wsadmin.sh. Once wsadmin prompt is launched, execute the following scripts to set the JVM heap sizes.


$AdminTask setJVMInitialHeapSize {-serverName  SERVER_NAME -nodeName  NODE_NAME -initialHeapSize 256}

$AdminTask setJVMMaxHeapSize {-serverName  SERVER_NAME    -nodeName  NODE_NAME -maximumHeapSize 1024}

$AdminConfig save


where, heap size is in MB

thank you pavan