node . js . OS . totalmem()方法
原文:https://www.geeksforgeeks.org/node-js-os-totalmem-method/
os.totalmem()方法是 os 模块的内置应用编程接口，用于获取系统内存总量(以字节为单位)。
语法:
os.totalmem()
参数:此方法不接受任何参数。
返回值:该方法返回一个整数值，以字节为单位指定系统内存总量。
下面的例子说明了 os.totalmem()方法在 Node.js 中的使用:
例 1:
// Node.js program to demonstrate the
// os.totalmem() method
// Import the os module
const os = require('os');
// Printing os.totalmem() method value
console.log(os.totalmem());
输出:
8502722560
例 2:
// Node.js program to demonstrate the
// os.totalmem() method
// Import the os module
const os = require('os');
// Convert total memory to kb, mb and gb
var total_memory = os.totalmem();
var total_mem_in_kb = total_memory/1024;
var total_mem_in_mb = total_mem_in_kb/1024;
var total_mem_in_gb = total_mem_in_mb/1024;
total_mem_in_kb = Math.floor(total_mem_in_kb);
total_mem_in_mb = Math.floor(total_mem_in_mb);
total_mem_in_gb = Math.floor(total_mem_in_gb);
total_mem_in_mb = total_mem_in_mb%1024;
total_mem_in_kb = total_mem_in_kb%1024;
total_memory = total_memory%1024;
// Display memory size
console.log("Total memory: " + total_mem_in_gb + "GB "
+ total_mem_in_mb + "MB " + total_mem_in_kb
+ "KB and " + total_memory + "Bytes");
输出:
Total memory: 7GB 940MB 848KB and 0Bytes
例 3:
// Node.js program to demonstrate the
// os.totalmem() method
// Import the os module
const os = require('os');
// Printing free memory out of total memory
console.log("Free Memory " + String(os.freemem())
+ " Bytes out of " + String(os.totalmem()) + " Bytes");
输出:
Free Memory 4161896448 Bytes out of 8502722560 Bytes
注意:以上程序使用node index.js命令编译运行。
参考:https://nodejs . org/API/OS . html # OS _ OS _ total mem
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