如何抛弃彼尔姆根(Permgen)? [英] How to dump Permgen?

问题描述

我想转储应用服务器的Permgen.

I wanted to take the dump of the Permgen of a application server.

我不想使用-XX:+TraceClassLoading -XX:+TraceClassUnloading，因为我不想重新启动服务器，我也不想使用jconsole.

I do not want to use -XX:+TraceClassLoading -XX:+TraceClassUnloading as i do not want to restart the server, Neither i want to use jconsole.

我有任何类似jmap的工具(用于堆转储未找到permgen的任何选项)来获取permgen，因此我只能提供pid.

I there any tool like jmap(used to heap dump didnt find any option for permgen) to get the permgen so that i can supply only the pid.

推荐答案

jmap -permstat <pid>

将产生这样的输出:

30337 intern Strings occupying 2746200 bytes.
class_loader    classes bytes   parent_loader   alive?  type

<bootstrap> 2031    7253392   null      live    <internal>
0x517474f0  1   1760      null      dead    sun/reflect/DelegatingClassLoader@0x43f95d38
0x4f83f670  1   1744    0x4ebfb8e8  dead    sun/reflect/DelegatingClassLoader@0x43f95d38
[...]

total = 287 10020   35889952        N/A     alive=3, dead=284       N/A  

这不是完整的转储，但是这样做可以让您进行一些调查.

This is not a full dump, but doing that is going to allow you to do some investigation.

我仍在寻找如何查找更多信息.

I am still looking on how to find more information.

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