Hello!

My company is currently evaluating JBoss and considering supporting it in 
addition to WebLogic and WebSphere.  I'm a big fan of OSS (and the lack of 
per-CPU licensing), so I'm motivated to get this working.

The problem we're currently experiencing is high memory usage after deploying 
our application.  Our application is made of a main .ear file which contains 
about 1090 beans - some session session beans and a lot of EJBs.  I'm 
monitoring the memory usage using verbosegc and prior to deploying this .ear 
file, the memory usage is about 90MB.  After deployment about 990MB is in use.  
Our max heap size is 1100MB, so there isn't much room left for doing actual 
work.  Since we're running with JRockit 1.4.2_05 on Linux, I'm not able to 
reliably allocate a heap larger than this.

We also started up with the IBM JDK, so we could use their HeapAnalyzer tool to 
verify the memory usage.  It showed that almost all of the memory allocated in 
the heap was for bean deployment.

Is anyone else deploying this many beans and if so, are you experiencing the 
same memory usage?  On other platforms, after deployment, we utilize about 
350MB in WebLogic and about 450MB in WebSphere.

All help is appreciated.

Thanks,
Chris Plough


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