Grails and Tomcat 7: Out of Memory (PermGen)
Deploying a Grails application to Tomcat 7 for the first time you may encounter the following error: java . lang . OutOfMemoryError : PermGen space Assumption: Windows Service To correct the problem, just adjust the default memory and Perm Gen space allocated in Tomcat 7. Start the service config tool "tomcat7w.exe: Change the Java Options: Switch to the Java tab: Change the “Initial Memory pool” to 128 Change the “Maximum memory pool” to 512 Perm Gen settings: Add the follow two lines to the Java options --XX:PermSize=256m --XX:MaxPermSize=265m Restart the service. Test your application References: http://www.grails.org/FAQ http://tomcat.apache.org/tomcat-7.0-doc/windows-service-howto.html