如何在Java中剖析对象创建？ [英] How to profile object creation in Java?

问题描述

与我一起工作的系统创建了大量的对象和垃圾，这些对象和垃圾一直在收集它们，导致堆耗量非常陡峭。我想知道哪些对象正在生成以调整代码，但我无法弄清垃圾收集开始时转储堆的方式。当我尝试通过JConsole随机手动启动dumpHeap时，我总是在GC完成运行后得到结果，并且没有得到任何有用的数据。

如何追踪过多的临时对象的创建是值得欢迎的。

http://kenai.com/projects/btrace/pages/Homerel =nofollow noreferrer> http://kenai.com/projects/btrace/pages/Home ），或者使用 jvisualvm 在JDK 6u18中进行实时内存采样。

The system I work with is creating a whole lot of objects and garbage collecting them all the time which results in a very steeply jagged graph of heap consumption. I would like to know which objects are being generated to tune the code, but I can't figure out a way to dump the heap at the moment the garbage collection starts. When I tried to initiate dumpHeap via JConsole manually at random times, I always got results after GC finished its run, and didn't get any useful data.

Any notes on how to track down excessive temporary object creation are welcome.

解决方案

Have a look at what BTrace can do (http://kenai.com/projects/btrace/pages/Home), alternatively try using jvisualvm in JDK 6u18 which does live memory sampling.

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