Difference between revisions of "Monitoring and Tuning Garbage Collection"
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Revision as of 18:49, 3 May 2011
Monitoring and Tuning Garbage Collection
To monitor the frequency of Garbage Collection inside the JVM:
$java_home/bin/jstat -gcutil pid <intervalmillis> [root@web1]# /usr/local/java/bin/jstat -gcutil 12929 5000 S0 S1 E O P YGC YGCT FGC FGCT GCT 0.00 42.66 37.32 12.82 26.96 4845 145.414 26 1.745 147.159 0.00 42.66 37.78 12.82 26.96 4845 145.414 26 1.745 147.159 0.00 42.66 57.70 12.82 26.96 4845 145.414 26 1.745 147.159
Tuning parameters are set in catalina.sh under CATALINA_OPTS
Learn More: http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html