System Administration - eXist: A NoSQL Database and Application Development Platform - page 393

Figure 15-4. VisualVM inspecting eXist memory use
JMC includes a facility called the Java Flight Recorder (JFR) that can record and
report information about events emitted by the JVM and applications running on the
JVM. At present, as JFR is very new technology, eXist does not emit any specific
events, but much can be gathered from the standard events emitted by the JVM itself.
As with VisualVM, JMC can monitor local or remote JVMs (through the use
of JMX).
If you have Oracle JDK 7u40 or later installed, you can start JMC simply by running
the jmc command from the bin folder of the JDK.