Node.js进程内存使用查看方法及返回对象的含义

var  mem = process.memoryUsage();
console.log(mem);
结果:
{
  rss: 4935680,
  heapTotal: 1826816,
  heapUsed: 650472,
  external: 49879
}　　

var mem = process.memoryUsage();
        var format = function(bytes) { 
              return (bytes/1024/1024).toFixed(2)+‘MB‘; 
        };
console.log(‘Process: heapTotal ‘+format(mem.heapTotal) + ‘ heapUsed ‘ + format(mem.heapUsed) + ‘ rss ‘ + format(mem.rss));