經常使用JVM啓動參數

// 8C 16G
-server 
-Xmx10880M 
-Xms10880M 
-XX:SurvivorRatio=8 
-XX:NewRatio=2 
-XX:PermSize=512m 
-XX:MaxPermSize=512m 
-XX:+HeapDumpOnOutOfMemoryError 
 -XX:HeapDumpPath=$LOG_HOME/$APP_KEY.heaperr.log.$(date +%Y%m%d%H%M) 
-XX:+DisableExplicitGC 
-XX:+PrintGCDetails 
-XX:+PrintGCDateStamps
-XX:+PrintGCCause 
-XX:+PrintCommandLineFlags 
-XX:+UseConcMarkSweepGC 
-XX:+UseParNewGC 
-XX:ParallelCMSThreads=4 
-XX:+UseCMSCompactAtFullCollection 
-XX:CMSFullGCsBeforeCompaction=1 
-XX:CMSInitiatingOccupancyFraction=72 
-XX:+CMSScavengeBeforeRemark 
-XX:+CMSParallelInitialMarkEnabled 
-XX:+ParallelRefProcEnabled 
-XX:+AlwaysPreTouch