Increasing the Java Heap size for a Admin Server & managed server in Weblogic

 The size is set in the setDomainEnv.sh file for Linux or setDomainEnv.cmd for Windows, which is in the $DOMAIN_HOME/bin directory.

Steps to set the heap size for Admin and managed server:

1. Shutdown Admin and Managed servers

2. Take backup of setDomainEnv.sh or setDomainEnv.cmd file in case something goes wrong, you can revert the changes. It is best practice to take backup before you made changes in the servers.

3. Open  setDomainEnv file that is under the  $DOMAIN_HOME/bin directory.

4. Copy and paste the below lines in the setDomainEnv file. Make sure you paste the below line at suitable location.

if [ "${SERVER_NAME}" == "AdminServer" ] ; then

USER_MEM_ARGS="-Xms1024m -Xmx1024m -XX:MaxPermSize=512m"

export USER_MEM_ARGS

fi

#In case of osb_server1 Server

if [ "${SERVER_NAME}" == "ms_server1" ] ; then

USER_MEM_ARGS="-Xms512m -Xmx4096m -XX:MaxPermSize=4096m"

export USER_MEM_ARGS

fi