如何正确设置 permgen 大小? [英] How do I properly set the permgen size?

问题描述

我有这个带有 tomcat、java 和 grails 的 VM.我一直收到 permgen 错误，所以我环顾四周并找到了解决方案:

I have this VM with tomcat, java, and grails in it. I've been getting permgen errors so I looked around and found the solution:

set JAVA_OPTS="-Xms256m -Xmx1024m -XX:PermSize=512m -XX:MaxPermSize=512m"

我使用 SSH 访问虚拟机并输入上面的参数.我想这会解决问题.问题是，我想确保我做对了.所以我再次搜索如何检查当前的 permSize，这是我得到的解决方案:

I use SSH to access the vm and type the arguments above. I suppose that would fix the problem. Thing is, I wanted to make sure that I did it correctly. So I searched again on how I could check the current permSize and this is the solution I got:

jinfo -flag MaxPermSize 6444

6444 是 pid，作为回应，我得到了这个.

6444 is the pid, and as a response, I got this.

-XX:MaxPermSize=85983232

问题:maxPermSize 的值是以字节为单位吗?因为，如果是，则意味着 java_opts 命令不起作用.我期望得到 512m 但 85983232 字节 = 82 mb .. 还是我看错了..?有人可以启发我吗?:

Question: Is the value of the maxPermSize in bytes? because, if it is, then that would mean that the java_opts command didn't work. I am expecting to get 512m but 85983232 bytes = 82 mb.. Or am I seeing it wrong..? Can anybody enlighten me on this? D:

推荐答案

您必须更改 Tomcat Catalina 启动文件中定义的 CATALINA_OPTS 选项中的值.要增加 PermGen 内存，请更改 MaxPermSize 变量的值，否则更改 Xmx 变量的值.

You have to change the values in the CATALINA_OPTS option defined in the Tomcat Catalina start file. To increase the PermGen memory change the value of the MaxPermSize variable, otherwise change the value of the Xmx variable.

Linux &Mac OS: 打开或创建setenv.sh 文件放在bin"目录中.您必须将更改应用于此行:

Linux & Mac OS: Open or create setenv.sh file placed in the "bin" directory. You have to apply the changes to this line:

export CATALINA_OPTS="$CATALINA_OPTS -server -Xms256m -Xmx1024m -XX:PermSize=512m -XX:MaxPermSize=512m"

Windows:

打开或创建放在bin"目录下的setenv.bat文件:

Open or create the setenv.bat file placed in the "bin" directory:

set CATALINA_OPTS=-server -Xms256m -Xmx1024m -XX:PermSize=512m -XX:MaxPermSize=512m

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