统计nginx进程占用的物理内存

#!/usr/bin/env python
#-*- coding:utf-8 -*-

''' 统计nginx进程占用的物理内存 '''

import os
import sys
import subprocess

def getPidList(proc):
    cmd = '''/usr/sbin/pidof %s''' % proc
    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True)
    pidList = p.stdout.read().split()
    return pidList

def getMemSize(pidList):
    sum = 0
    for pid in pidList:
        filename = os.path.join('/proc', pid, 'status')
        with open(filename) as fd:
             for line in fd.readlines():
                 if line.startswith('VmRSS'):
                     memSize = int(line.split()[1])
                     sum += memSize
                     break
    return sum

if __name__ == '__main__':
    proc = sys.argv[1]
    pidList = getPidList(proc)
    totalMem = getMemSize(pidList)
    print('%s占用物理内存：%sK' % (proc.capitalize(), totalMem))

[root@localhost ~]$ python 1.py nginx
Nginx占用物理内存：8056K