Profiling the Java application

1. Run jvisualvm from the <JDK_HOME>/bin folder:

Figure 11.1: Java VisualVM profiler

VisualVM lists all the Java processes that can be profiled by it on the local machine under the Local node. You can see VisualVM itself listed along with Eclipse.

2. Once you run the CourseManagement application, the process should also show up under Local:

Figure 11.2: The CourseManagement application available for profiling

3. Double-click on the process (or right-click and select Open). Then, go to the Profile tab and click on the CPU button:

Figure 11.3: VisualVM Profiler tab

You should see the status set as profiling running.

4. After starting CPU profiling, if you get an error such as Redefinition failed with error 62, try running the application with the -XVerify:none parameter. In Eclipse, select the Run | Run Configurations menu...