liferay running slow

I have installed Liferay-Tomcat 6.0.6 on one of my Linux machine having 4GB of RAM and it uses MySQL installed on a different machine.

The liferay runs really slow even for 10 concurrent users.

I have attached the screen s开发者_JAVA技巧hot taken from the AppDynamics which shows EhCache and C3PO both are responding slow at times.

Are there any special config required for EhCache or C3PO??

I am currently running with default configurations.

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can you tell me the methodology for deriving those stats? In most cases, this behavior comes down to poor code implementation in a custom portlet or a JVM configuration issue and more likely the latter. Take a look at the Ehcache Garbage Collection Tuning Documentation. When you run jstat, how do the garbage collection times look?