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weblogic : OutOfMemoryError: PermGen space

hi guys

When i am starting my application using weblogic applications server 10.x
i get this error on my colsole.

Caused by: java.lang.OutOfMemoryError: PermGen space
      at java.lang.ClassLoader.defineClass1(Native Method)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
      at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
      at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:335)
      at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:288)
      at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:256)
      at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:54)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:251)


any idea how i can fix this?  I mean how can i fix this in application server?

thanks.
0
royjayd
Asked:
royjayd
  • 2
1 Solution
 
Sathish David Kumar NArchitectCommented:
Increase your JVM memeory !
0
 
ramazanyichCommented:
Your outofmemory issue is related to the size of special pool of JVM memory Permanent Generation. You can read more about it on https://blogs.oracle.com/jonthecollector/entry/presenting_the_permanent_generation. In general it contains some objects related to the classes that are used in your JVM. And on application server number of that classes is quite big and doesn't fit into the default size of that permanent generation space.
You can increase memory which is used by that part of JVM heap by adding -XX:MaxPermSize=512M
Do not forget to increase heap size also -Xmx1024M
I would recommend adidng following in the startup options of your server:
-Xmx512M -Xmx1024M -XX:PermSize=256M -XX:MaxPermSize=512M
0
 
royjaydAuthor Commented:
What i observed is if i increase the MaxPermSize to 512M it really slows down the system.
I have 3 gb ram.

thx
0
 
ramazanyichCommented:
Try to use -Xmx2048m
0

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