JConsole - a monitoring tool that complies to the Java Management Extensions (JMX) specification

The JConsole graphical user interface uses the extensive instrumentation of the Java Virtual Machine (Java VM) to provide information about the performance and resource consumption of applications running on the Java platform.

You start JConsole by typing the following command at the command line.

% jconsole

Once you have connected JConsole to an application, JConsole is composed of six tabs.

• Overview: Displays overview information about the Java VM and monitored values.
• Memory: Displays information about memory use.
• Threads: Displays information about thread use.
• Classes: Displays information about class loading.
• VM: Displays information about the Java VM.
• MBeans: Displays information about MBeans.