JAVA_OPTS="-Xmx400m -Xms400m -XX:PermSize=128m -XX:MaxPermSize=400m -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -XX:G1ReservePercent=30 -XX:InitiatingHeapOccupancyPercent=35 -XX:ConcGCThreads=1 -XX:+UnlockCommercialFeatures -XX:+FlightRecorder -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=1 -XX:GCLogFileSize=50M -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:/data/logs/tomcat/gc.log -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.port=10102"
原文：http://www.cnblogs.com/welcomer/p/5068337.html