如何看看我的Java进程现在在做什么？(How to see what my Java process is doing right now?)

如何看看我的Java进程现在在做什么？(How to see what my Java process is doing right now?)

我有一个应用程序服务器进程，它始终处于100％的CPU。 我一直都是指数小时甚至数天。

我知道如何生成堆/线程转储，但我正在寻找更多动态信息。 我想知道那里有多少CPU。 有几十（或可能是100+）线程。 我知道那些线程是什么，但我需要知道他们中的哪些人正在使用我的CPU。

我如何获得这些信息？

I have an app server process that's constantly at 100% CPU. By constantly I mean hours, or even days.

I know how to generate a heap/thread dump, but I'm looking for more dynamic information. I would like to know what is using so much CPU in there. There are tens (or probably 100+) threads. I know what those threads are, but I need to know which of them are using my CPU so much.

How can I obtain this information?

最满意答案

使用分析器。 有一个包含在与Oracle JDK一起提供的VisualVM中。

先进的商业版本（试用许可证）是YourKit 。

Use a profiler. There is one included in VisualVM which comes with the Oracle JDK.

An advanced commercial one (trial licenses available) is YourKit.