We use Jenkins as our CI solution for a large Java web application. We have many junit tests.On the "old" server where we have Jenkins running, we have no problems. Everything runs smoothly. We recently set up Jenkins on the "new server" running Windows 8 that we are eventually going to use. On the new server, we are running into issues when Jenkins runs the unit tests. I should also mention that both servers access the same code base on our Subversion server. The problem is the tests run very slowly and we eventually get out of memory exceptions with respect to PermGen space (on the tests that are associated with Hibernate). I think I solved that issue by adding -XX:MaxPermSize=1024m -XX:+CMSPermGenSweepingEnabled to the Java Options on the project where the issues lie. But the tests still run incredibly slowly. And now we end up running out of heap space. Both of our Jenkins deployments are running inside Tomcat. Also, we didn't need to add any Java Options on the "old" server with respect to PermGen or heap space. So to recap, for the same code base, Jenkins runs smoothly on one server, but on another server is running out of PermGen and then regular heap space, and also running very slowly.
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