JAVA虚拟机内存调节

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发布时间：2019-02-28

本文共 1054 字，大约阅读时间需要 3 分钟。

JVM?????????????????

1. ?????

?JVM??????????????????????????????????????????

-Xmx128m?????????????????50%??????????????????????????

-Xms128m?????????????????????????????????????????????

-Xmn128m????????????????????????sun????????3/8????????????????????????????

-XX:NewSize=n????????????????????????????

-XX:PermSize=128m?????????????????1/8?

-XX:MaxPermSize=128m??????????????PermGen???

-XX:NewRatio=3???????????????????3??????????1/4?

-XX:SurvivorRatio=3??????Eden????Survivor??????????3??Eden????????4/5?

2. ?????

?????????????????????????????????

-Xss?????????HotSpot????????????????????10m?

-Xos???????????HotSpot??????????-Xss?????

3. ???????

???????JVM????????????????

%JAVA_HOME%\bin\jconsole.exe?JDK???????????????????????????

4. ?????????????

?????????????????????PermGen????????????

Caused by: java.lang.OutOfMemoryError: PermGen space?????????????????????-XX:MaxPermSize=512m???????????

????

?????????????????????????????????

?????????jconsole.exe??????????????????

???????????????????????????????????????

????????????????JVM??????????????????

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