GCViewer - garbage collection visualized

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GCViewer is a free open source tool to visualize data produced by the Java VM options -verbose:gc and-Xloggc:. It also calculates garbage collection related performance metrics (throughput, accumulated pauses, longest pause, etc.). This can be very useful when tuning the garbage collection of a particular application by changing generation sizes or setting the initial heap size. See here for a useful summary of garbage collection related JVM parameters. For more information on tuning garbage collection on Sun JVMs, take a look at the documentation provided by Sun.

Supported Formats

• Sun JDK 1.4/1.5 with the options -Xloggc: [-XX:+PrintGCDetails]
• Sun JDK 1.2.2/1.3.1/1.4 with the option -verbose:gc
• IBM JDK 1.3.1/1.3.0/1.2.2 with the option -verbose:gc
• IBM iSeries Classic JVM 1.4.2 with option -verbose:gc
• HP-UX JDK 1.2/1.3/1.4.x with the option -Xverbosegc
• BEA JRockit 1.4.2/1.5 with the option -verbose:memory

Best results are achieved with: -Xloggc: -XX:+PrintGCDetails