jvm 参数设置相关网址

https://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html

可以在线练习设置jvm相关参数

http://jvmmemory.com/

例

-Xms2g -Xmx4g -XX:MetaspaceSize=1g -XX:MaxMetaspaceSize=2g -Xloggc:/opt/logs/jvm.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=30m 
-XX:+PrintGCApplicationStoppedTime -XX:+PrintTenuringDistribution -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -XX:+HeapDumpOnOutOfMemoryError
-XX:HeapDumpPath=/opt/logs/oom.hprof -XX:+PrintCommandLineFlags -XX:+PrintFlagsInitial -XX:+PrintFlagsFinal