垃圾收集通知？ [英] Garbage collection notification?

问题描述

我想用JVM注册一个回调，所以我知道什么时候垃圾回收正在发生。有没有办法做到这一点？编辑：我想这样做，所以我可以注销垃圾收集时发生在我的应用程序日志，所以我可以看到它是否与我看到的问题相关。打开-Xloggc很有帮助，但将GC日志（使用自应用程序启动后的秒数）的时间集成到我的主应用程序日志中有点棘手。

编辑2012年4月：截至Java7u4，您可以从GarbageCollectorMXBean（一个漂亮的示例 ）。

解决方案

从Java7u4开始，您可以从GarbageCollectorMXBean获取通知。请参阅 http://docs.oracle.com /javase/7/docs/jre/api/management/extension/com/sun/management/GarbageCollectionNotificationInfo.html

I'd like to register a callback with the JVM so I know when garbage collection is happening. Is there any way to do this?

EDIT: I want to do this so I can log out when garbage collection happens in my application log, so I can see if it correlates to problems I'm seeing. Turning on -Xloggc is helpful, but it is a little tricky to integrate the times from the GC log (which use seconds since app start) into my main application log.

EDIT April 2012: As of Java7u4, you can get notifications from the GarbageCollectorMXBean (a nice example).

解决方案

As of Java7u4, you can get notifications from the GarbageCollectorMXBean. See http://docs.oracle.com/javase/7/docs/jre/api/management/extension/com/sun/management/GarbageCollectionNotificationInfo.html

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