jvisualvm – Java Virtual Machine Monitoring, Troubleshooting, and Profiling Tool

jvisualvm – Java VisualVM is an intuitive graphical user interface that provides detailed information about Java technology-based applications (Java applications) while they are running on a given Java Virtual Machine (JVM*). The name Java VisualVM comes from the fact that Java VisualVM provides information about the JVM software visually.

Usage:-

– Java VisualVM is useful to Java application developers to troubleshoot applications and to monitor and improve the applications’ performance.

– Java VisualVM can allow developers to generate and analyse heap dumps, track down memory leaks, perform and monitor garbage collection, and perform lightweight memory and CPU profiling.

– Plug-ins also exist that expand the functionality of Java VisualVM. For example, most of the functionality of the JConsole tool is available via the MBeans Tab and JConsole Plug-in Wrapper plug-ins.

You can choose from a catalog of standard Java VisualVM plug-ins by selecting ‘Tools’ | ‘Plugins’ in the Java VisualVM menus.

Start Java VisualVM with the following command:

#  jvisualvm <options>

Ref: http://java.sun.com/javase/6/docs/technotes/tools/share/jvisualvm.html

Eclipse Memory Analyzer (MAT)

Memory Analyzer (MAT)

The Eclipse Memory Analyzer is a fast and feature-rich Java heap analyzer that helps you find memory leaks and reduce memory consumption.

Use the Memory Analyzer to analyze productive heap dumps with hundreds of millions of objects, quickly calculate the retained sizes of objects, see who is preventing the Garbage Collector from collecting objects, run a report to automatically extract leak suspects.

Source: http://www.eclipse.org/mat/

PS Download the standalone and nJoy 🙂

Also – it has nice HeapDump parsing …