强制将内存释放到操作系统 [英] Force memory release to the OS

问题描述

我有一个需要约20 MB内存的应用程序。在很少使用的算法中，它（std :: vector）临时分配250 MB。解除分配后，系统监视器仍显示此用法。如何将内存释放回系统？

I have an app that takes about 20 MB of ram. In an seldom used algorithm it (std::vector) temporarily allocates 250 MB. After the deallocation the systemmonitor still shows this usage. How can I release the memory back to the system?

推荐答案

您不能也不应这样做。

虚拟内存分配很复杂，仅通过在系统监视器中查看一个数字就无法充分理解。看起来进程似乎在使用比其应有的内存更多的内存，但这只是虚拟内存寻址工作方式的伪像。

Virtual memory allocation is complicated, and cannot be sufficiently understood by simply watching a number in System Monitor. It may appear as if a process is using more memory than it should, but this is just an artefact of the way virtual memory addressing works.

请放心，如果您有

这里唯一可采取的实际操作是停止使用系统监视器，就好像它已被释放一样。准确测量您的进程正在使用的物理RAM！

The only real actionable point here is to stop using System Monitor as if it were an accurate measure of physical RAM in use by your process!

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