-Xmx4g
-Xms4g
-Xss256k
-XX:MetaspaceSize=128m
-XX:MaxMetaspaceSize=512m
-Xnoclassgc
-XX:+UseConcMarkSweepGC
-XX:+UseParNewGC
-XX:ParallelGCThreads=12
-XX:MaxTenuringThreshold=15
-XX:+ExplicitGCInvokesConcurrent
-XX:+CMSParallelRemarkEnabled
-XX:SurvivorRatio=8
-XX:CMSInitiatingOccupancyFraction=65
-XX:+UseCMSInitiatingOccupancyOnly
-XX:+UseCMSCompactAtFullCollection
-XX:+CMSClassUnloadingEnabled
-XX:+UseGCLogFileRotation
-XX:NumberOfGCLogFiles=10