The JVM Layer

The JVM layer measures the overall health of the JVM engine by reporting statistics related to the following:

• How well the CPU is utilized by the JVM engine?
• How well does the JVM engine manage memory?
• What is the uptime of the JVM engine?
• 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 layer