Increasing the heap in weblogic 11g

There are 2 different type of servers in Weblogic Server




1. Admin Server



2. Managed Server



Increasing JVM Size of Admin Server

JVM size of Admin server can be increased by changing Xmx and Xms values in setDomainEnv.sh which is located in $MW_HOME/user_projects/domains//bin



There are two blocks for XMX and XMS in setDomainEnv.sh. Depending up on type of JVM make changes in second block. Below I changed the value of XMX and XMS of 64 Bit SUN Java to 2048 and 1024.



XMS_SUN_64BIT=”256″

export XMS_SUN_64BIT

XMS_SUN_32BIT=”256″

export XMS_SUN_32BIT

XMX_SUN_64BIT=”512″

export XMX_SUN_64BIT

XMX_SUN_32BIT=”512″

export XMX_SUN_32BIT

XMS_JROCKIT_64BIT=”256″

export XMS_JROCKIT_64BIT

XMS_JROCKIT_32BIT=”256″

export XMS_JROCKIT_32BIT

XMX_JROCKIT_64BIT=”512″

export XMX_JROCKIT_64BIT

XMX_JROCKIT_32BIT=”512″

export XMX_JROCKIT_32BIT



XMS_SUN_64BIT=”1024″

export XMS_SUN_64BIT

XMS_SUN_32BIT=”512″

export XMS_SUN_32BIT

XMX_SUN_64BIT=”2048″

export XMX_SUN_64BIT

XMX_SUN_32BIT=”1024″

export XMX_SUN_32BIT

XMS_JROCKIT_64BIT=”512″

export XMS_JROCKIT_64BIT

XMS_JROCKIT_32BIT=”512″

export XMS_JROCKIT_32BIT

XMX_JROCKIT_64BIT=”1024″

export XMX_JROCKIT_64BIT

XMX_JROCKIT_32BIT=”1024″

export XMX_JROCKIT_32BIT



Increasing JVM Size of Managed Server

JVM size of Managed Server can be increased from Weblogic console. This can be achieved by adding Xmx and Xms values start tab in Managed server shown as below



Servers >> ;Server-0>>;Start Tab>> ; Arguments


There are two ways to increase the heap size in weblogic.




If you do not have a nodemanager configured. Login the operating system , Under $domain_home/bin directory look for setDomainEnv.sh and add the following -512Xmx -512Xms to the java options.








If you are using the nodemanager then Login to the weblogic Administration console, then click on Servers --> ServerName --> General -->Start Options and look for the Java Arguments

Here you can add -512Xmx -512Xms to the java arguments. If you want to increase the heap size then alter these values from 512 to 1024 depending on your requirements.