Set User Defined JVM Memory Arguments in JDeveloper

Steps

1. Locate the file: setDomainEnv.cmd which should be at:
   
   [JDeveloper Working Directory]\jdeveloper\system.xxx.xx.xx\DefaultDomain\bin
   
   
   Note:
   [JDeveloper Working Directory] will be "C:\Documents and Settings\<username>\Application Data per default
   xxx.xx.xx will be a version number
2. After the comments at the start of the file add the following environment variable with your required settings.
   
   ...
   @REM For additional information, refer to "Managing Server Startup and Shutdown for Oracle WebLogic Server"
   @REM (http://download.oracle.com/docs/cd/E12839_01/web.1111/e13708/overview.htm).
   @REM *************************************************************************
   ...
   
   set USER_MEM_ARGS=-Xms1024m -Xmx1024m -XX:MaxPermSize=256m
3. Save the file.
   
4. Run any web project and verify it picks up the new settings.
   
   *** Using port 7101 ***
   <PATH_TO_SYSTEM_FOLDER>\system11.1.1.2.36.55.36\DefaultDomain\bin\startWebLogic.cmd
   [waiting for the server to complete its initialization...]
   .
   .
   JAVA Memory arguments: -Xms1024m -Xmx1024m -XX:MaxPermSize=256m
   .
   WLS Start Mode=Development