java -jar -Xmx1g -Xms1g -Xss256k -XX:MaxDirectMemorySize=1G -XX:+UseG1GC -XX:MaxGCPauseMillis=200 -XX:G1ReservePercent=25 -XX:InitiatingHeapOccupancyPercent=40 -XX:+PrintGCDateStamps -Xloggc:/opt/cachecloud-web/logs/gc.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/opt/cachecloud-web/logs/java.hprof -XX:+DisableExplicitGC(不要) -XX:-OmitStackTraceInFastThrow -XX:+PrintCommandLineFlags -XX:+UnlockCommercialFeatures -XX:+FlightRecorder -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true -Djava.util.Arrays.useLegacyMergeSort=true -Dfile.encoding=UTF-8 demossd.jar