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  Tutorial: Using JConsole to Monitor Applications

JConsole is the Java Monitoring and Management Console, a new graphical tool shipped in J2SE JDK 5.0. This article describes how JConsole can be used to observe information about an application running on the Java platform, with an overview of the J2SE 5.

Tutorial Details:

The Java 2 Platform, Standard Edition (J2SE) 5.0 release provides comprehensive monitoring and management support. It not only defines the management interfaces for the Java virtual machine, but also provides out-of-the-box remote monitoring and management on the Java platform and of applications that run on it. In addition, JDK 5.0 includes the Java Monitoring and Management Console (JConsole) tool. It uses the extensive instrumentation of the Java virtual machine to provide information on performance and resource consumption of applications running on the Java platform using Java Management Extension (JMX) technology.

The article describes how JConsole can be used to observe information about an application running on the Java platform. The article first gives an overview of the J2SE 5.0 monitoring and management architecture and how JConsole plugs into the architecture. It then describes how to use JConsole to access several core monitoring and management functionalities provided by the Java platform including:


Detect low memory
Enable or disable GC and class loading verbose tracing
Detect deadlocks
Control the log level of any loggers in an application
Access OS resources—Sun's platform extension
Manage an application's Managed Beans (MBeans)


 

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