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