What can be done with 'PermGen out of space' exception in Tomcat-Spring-Hibernate web application?

Question

We have an web application that uses Spring-Hibernate to persist registered users data in Oracle database. The application works fine in development environment, but when we

Answer 1

If you're running on jdk6 then you can use the jconsole app to monitor the memory usage of the application and investigate further.

Another avenue to pursue is to use a profiler, I use JProfiler, and take a look at the application with that. It will tell you exactly where the problem is coming from.