JSF memory leak: heap view

[javatwo]

Hi, I have a JSF web app using Richfaces, MyFaces and jsf ri running on JBoss 5.1.0.GA.

JVM memory setting is :

-Xms128M -Xmx1024M -XX:MaxPermSize=512M

After running for a while, OutOfMemory error: java heap size and got a heap dump.

Load the heap dump into JProfiler, the image attached.

Total sessions: 50.

Memory used by sessions: from 5M to 65M.

session with 5M memory:  1 AjaxStateHodler$StateReference instance

session with 65M memory: 12 AjaxStateHodler$StateReference instances

web.xml

-----------

  <context-param>
      <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
      <param-value>server</param-value>
  </context-param>

  <context-param>
     <param-name>com.sun.faces.numberOfViewsInSession</param-name>
     <param-value>5</param-value>
  </context-param>

  <context-param>
     <param-name>com.sun.faces.serializeServerState</param-name>
     <param-value>true</param-value>
  </context-param>

the param "com.sun.faces.numberOfViewsInSession" is set to 5 in web.xml.

it means max 5 views are saved in session. but for the sessions with 65M memory, it saved 12 views in session.

Also, the param "com.sun.faces.serializeServerState" is set to true, view state is stored in memory?

I expected the memory used by each JSF view state to be about 500K, but it was 5M.

Thanks very much for any help identifying memory leak.

Dave

[javatwo]

After setting the  com.sun.faces.numberOfLogicalViews to 2, limit the number of view states to be saved.

<context-param>
      <param-name>com.sun.faces.numberOfViewsInSession</param-name>
      <param-value>2</param-value>
   </context-param>
  
   <context-param>
      <param-name>com.sun.faces.numberOfLogicalViews</param-name>
      <param-value>2</param-value>
   </context-param>  
     

What is the relationship between logical views and views?  Actually what is logical views?

From VisualVM memory monitor, the heap keeps growing even without any http requests. why?

After perform GC, heap memory went down.

Thanks,
Dave