您如何在Ruby中找到计算机上可用的物理内存? [英] How do you find the physical memory free on the machine in Ruby?

问题描述

我想知道系统上有多少物理内存可用，不包括任何交换.有没有一种方法可以在Ruby中获取此信息?

I would like to know how much physical memory is available on the system, excluding any swap. Is there a method to get this information in Ruby?

推荐答案

如果您使用的是Linux，则通常使用"free"命令查找物理内存，即系统上的RAM详细信息

If you are using linux,You usually use a "free" command to find physical memory ie RAM details on the system

 output = %x(free)

输出看起来类似于以下字符串

output will look slightly like the following string

" total used free shared buffers cached\nMem: 251308 201500 49808 0 3456 48508\n-/+ buffers/cache: 149536 101772\nSwap: 524284 88612 435672\n"

" total used free shared buffers cached\nMem: 251308 201500 49808 0 3456 48508\n-/+ buffers/cache: 149536 101772\nSwap: 524284 88612 435672\n"

您可以使用简单的字符串操作(如

You can extract the information you need using simple string manipulations like

output.split(" ")[7]将提供总内存 output.split(" ")[8]将提供使用的内存 output.split(" ")[9]将释放可用内存

output.split(" ")[7] will give total memory output.split(" ")[8] will give used memory output.split(" ")[9] will give free memory

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