如何从Java程序中获取JVM的最小和最大堆大小设置

Question

如何从Java程序中获取VM的最小和最大堆大小设置？

Answer 1

最大堆大小:

Runtime.getRuntime().maxMemory();

您可能会感兴趣的其他一些计算:

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;