GCViewer

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, and longest pause). It supported format are 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 , and BEA JRockit 1.4.2/1.5 with the option -verbose:memory. It can also export the data in CSV (comma separated values) format, which may easily be imported into spreadsheet applications for further processing.