如何从Java程序中获取JVM的最小和最大堆大小设置 [英] how to get the min and max heap size settings of a JVM from within a Java program

问题描述

如何从Java程序中获取VM的最小和最大堆大小设置？

How to get the min and max heap size settings of a VM from within a Java program?

推荐答案

最大堆大小：

Runtime.getRuntime().maxMemory();

您可能会感兴趣的其他一些计算：

Some other calculations which you may find interesting:

Runtime runtime = Runtime.getRuntime();
long maxMemory = runtime.maxMemory();
long allocatedMemory = runtime.totalMemory();
long freeMemory = runtime.freeMemory();
long totalFreeMemory = freeMemory + (maxMemory - allocatedMemory);
long usedMemory = maxMemory - totalFreeMemory;

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