SOA 12c: Change JVM Heap Size for Integrated WebLogic Server Domain

Follow these steps:

1. Open JDeveloper
2. Go to the Application Servers tab
3. Right click on the IntegratedWebLogicServer -> Properties
4. Go to Lauch Settings tab
5. Click on "More Launch Settings"

6. Click on Environment variables and select  USER_MEM_ARGS.

7. Change the memory size and click on ok.
8. Restart  JDeveloper

You can also directly go to the file system and change memory size

Go to

C:\Users\User\AppData\Roaming\JDeveloper\system12.1.3.0.41.140521.1008\DefaultDomain\bin

and modify  setStartupEnv.cmd file

@REM 64 bit JVM memory settings
    set SERVER_MEM_ARGS_64=-Xms1024m -Xmx2048m
    set SERVER_MEM_ARGS_64HotSpot=-Xms1024m -Xmx2048m -XX:PermSize=512m -XX:MaxPermSize=1024m
    set SERVER_MEM_ARGS_64JRockit=-Xms1024m -Xmx2048m

Start the IntegratedWeblogicDomain and see the new values.