如何从Windows命令行运行时请求JVM垃圾回收（而不是代码） [英] How to request JVM garbage collection (not from code) when run from Windows command-line

问题描述

如何从外部请求Java垃圾收集，从JAR（Windows BAT使用）启动程序？

how could I request Java garbage collection externally, starting the program from JAR (Windows BAT used)?

• 从Java代码中我可以用 System.gc（） / li>
  
• 运行JNLP发行版时，我从控制面板/ Java / ...打开了Java控制台，并且此Java控制台提供了手动垃圾回收。

• From the Java code I can do it with System.gc()
• When running a JNLP distribution, I get this "Java console" turned on from Control Panel / Java / ... and this Java console provides manual garbage collection.

但是...当我从命令行/ bat运行jar时，java控制台似乎没有打开。

But... When I'm running the jar from command-line / bat the java console doesn't seem to open. Couldn't find help with a brief googling, maybe somebody here?

推荐答案

您可以使用 jconsole 连接到本地运行的JVM - 这提供了一个Perform

You can use jconsole to connect to a JVM that is running locally - This provides a "Perform GC" button on the GUI.

您需要在启动java进程时指定 -Dcom.sun.management.jmxremote 。

You'll need to specify -Dcom.sun.management.jmxremote when you kick off your java process.

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