Hello, You should change the JAVA_OPTS value in the <JBOSS_HOME>/bin/run.conf file to increase the heap size. | JAVA_OPTS="-server-Xms128m -Xmx512m-Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000" | Here, The minimum heap size is 128m and you can set the maximum heap size to any value. Some example parameters for maximum heap size is 512m, 1024m and 2048m. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3966900#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...