FusionReactor has a dedicated tool to track the object usage within the heap memory of the JVM called the heap viewer.

The page will show all the unique classes and the count of live objects for each class. You also have the option to inspect the garbage collection roots for each class to see what is keeping these objects.

Taking point in time snapshots of the heap allows you to detect potential memory leaks within your application.

To find out more about the heap viewer see the documentation.