使用python获取应用程序占据的内存

#!/usr/bin/env python

#coding:utf-8

import os

from subprocess import Popen,PIPE

def gitPid():   #拿到java系统进程值

p = Popen([‘pidof‘,‘java‘],stdout=PIPE,stderr=PIPE)

pids = p.stdout.read().split()

return pids

def parsePidFile(pids):  #访问VmRSS物理内存值并作累计

sum = 0

for i in pids:

fn = os.path.join(‘/proc/‘,i,‘status‘)

with open(fn) as fd:

for line in fd:

if line.startswith(‘VmRSS‘):

http_mem = int(line.split()[1])

sum += http_mem

break

return sum

def total_mem(self):

with open(self) as fd:

for line in fd:

if line.startswith(‘MemTotal‘):

total_mem = int(line.split()[1])

return total_mem

if __name__ == ‘__main__‘:

pids = gitPid()

http_mem = parsePidFile(pids)

total = total_mem(‘/proc/meminfo‘)

print "nginx使用内存:%s KB" % http_mem

print "占总共内存的使用量: %.2f%% " % (http_mem/float(total)*100)