The JVM Internals Layer

The tests associated with this layer measure the internal health of the Java Virtual Machine (JVM), and enables administrators to find accurate answers to the following performance queries:

• How many classes have been loaded/unloaded from memory?
• Did garbage collection take too long to complete? If so, which memory pools spent too much time in garbage collection?
• Are too many threads in waiting state in the JVM?
• Which threads are consuming CPU?

Figure 1 : The tests associated with the JVM Internals layer