Update jvm options

Dockerfile

@@ -16,8 +16,8 @@ ENV EXT_JVM_OPTS="${JAVA_OPTS}"
 
 ENV JVM_OPTS="-javaagent:/opt/skywalking-agent/skywalking-agent.jar=agent.service_name=${APP_NAME},collector.backend_service=skywalking-oap-server.devops:11800\
               -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=1099 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false\
-              -XX:+AlwaysPreTouch -XX:MinRAMPercentage=75 -XX:MaxRAMPercentage=75 -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=256m -XX:NativeMemoryTracking=summary\
-              -XX:+UseG1GC -XX:G1HeapRegionSize=2m -Xlog:gc*:/data/logs/gc/gc-%t.log:time,uptime\
+              -XX:MaxRAMPercentage=75 -XX:MaxMetaspaceSize=256m -XX:NativeMemoryTracking=summary\
+              -XX:+UseG1GC -XX:+UseStringDeduplication -XX:G1HeapRegionSize=8m -Xlog:gc*:/data/logs/gc/gc-%t.log:time,uptime\
               -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/data/heapdump/heapdump.hprof -XX:OnOutOfMemoryError=/app/dump-file-rollover.sh\
               -XX:-OmitStackTraceInFastThrow -XX:+PrintCommandLineFlags"