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mohanmca/JVM titbits

Last active August 29, 2015 14:06
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JVM titbits
Always start truning the young generation first.
java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -verbose:gc -Xloggc:/var/tmp/jvm_gc.log
java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:PrintHeapAtGc -XX:-PrintTenuringDistribution -XX:-HeapDumpOnOutOfMemoryError -verbose:gc -Xloggc:/var/tmp/jvm_gc.log
Histogram
-XX:-PrintClassHistogram (JMap -histo)
//vi /usr/java/jre1.7.0/bin/jstatd.policy
grant codebase "file:/usr/java/jre1.7.0/lib/tools.jar" {
permission java.security.AllPermission;
};
jstatd -p 9999 -J-Djava.security.policy=/usr/java/jre1.7.0/bin/jstatd.policy -J-Djava.rmi.server.hostname=192.168.0.106
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