Chapter 1 Introducing HPjmeter 3.0

HPjmeter is a performance analysis tool for deployed Java applications. It will help you identify performance problems in your production environment as well as during development.

	NOTE: You cannot use HPjmeter to monitor Java applets in a production environment.

HPjmeter helps you diagnose many types of Java application problems that occur only after a product is deployed. The types of problems you can identify include:

These problems may not be apparent or reproducible before you deploy your application because they depend on unique conditions present only in deployment.

With HPjmeter you can also gain a comprehensive overview of certain states of a running JVM and running applications, including details on memory usage, garbage collection, runtime, and class loading, for example. Using HPjmeter's ability to interact with the Java Management Extensions (JMX) component in the JVM, you can also manipulate operations during a monitoring session to control the state of some logging mechanisms, to gather snapshots of stack traces and memory details, and to trigger garbage collection.