统计apache进程占用的物理内存
[root@133 ~]# ps aux | grep httpd
root 13698 0.0 0.0 185628 4356 ? Ss 17:12 0:00 /usr/sbin/httpd
apache 13705 0.3 0.1 293504 27340 ? S 17:12 0:00 /usr/sbin/httpd
apache 13706 0.3 0.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 13707 0.3 0.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 13708 0.3 0.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 13709 0.3 0.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 13710 0.3 0.1 293504 27328 ? S 17:12 0:00 /usr/sbin/httpd
apache 13711 0.3 0.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 13712 0.3 0.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
root 13831 0.0 0.0 103320 908 pts/6 S+ 17:15 0:00 grep httpd
#使用pidof查看所有httpd的进程号
[root@133 ~]# pidof httpd
13712 13711 13710 13709 13708 13707 13706 13705 13698
[root@133 ~]# cd /proc/13698 #apache的主进称，其它都是子进称
[root@133 13698]# cat status
Name: httpd
State: S (sleeping)
Tgid: 13698
Pid: 13698
PPid: 1
TracerPid: 0
Uid: 0 0 0 0
Gid: 0 0 0 0
Utrace: 0
FDSize: 64
Groups: 0
VmPeak: 185628 kB
VmSize: 185628 kB
VmLck: 0 kB
VmHWM: 4356 kB
VmRSS: 4356 kB ＃这是该进称占用的物理内存
VmData: 1812 kB
VmStk: 88 kB
VmExe: 336 kB
VmLib: 9964 kB
VmPTE: 376 kB
VmSwap: 0 kB
那么将所有httpd的进程所占用的物理内存之和统计出来，即可统计出apache服务占用的所有内存
In [15]: from subprocess import Popen,PIPE
In [16]: p=Popen(['pidof','httpd'],stdout=PIPE,stderr=PIPE)
In [22]: p.stdout.read().split()
Out[22]:
['13712',
'13711',
'13710',
'13709',
'13708',
'13707',
'13706',
'13705',
'13698']
测试
[root@133 systeminformation]# vim 10_httpd.py
#!/usr/bin/env python
import os
import subprocess
from subprocess import Popen,PIPE
def getPid():
p = Popen(['pidof', 'httpd'], stdout=PIPE,stderr=PIPE)
pids = p.stdout.read().split()
print pids #打印httpd进称号
return pids
def parsePidFile(pids):
sum = 0
for i in pids:
fn = os.path.join('/proc/',i,'status')
print fn ＃打印文件路径
with open(fn) as fd:
for line in fd:
if line.startswith('VmRSS'):
http_mem = int(line.split()[1])
print http_mem ＃打印每个进称占用的内存，单位k
sum += http_mem ＃计算httpd占用的总内存
break
return sum
if __name__ == '__main__':
pids = getPid()
print parsePidFile(pids)
[root@133 systeminformation]# python 10_httpd.py
['18547', '18546', '18545', '18544', '18543', '18542', '18541', '18540', '18533']
/proc/18547/status
41404
/proc/18546/status
41364
/proc/18545/status
58100
/proc/18544/status
41388
/proc/18543/status
41372
/proc/18542/status
41376
/proc/18541/status
58100
/proc/18540/status
41416
/proc/18533/status
4348
368868 ＃httpd占用的总内存，单位kb
计算所有的httpd进称占用的物理内存，（VmRSS）的大小，占所有物理内存的比例。
/proc/meminfo
[root@133 systeminformation]# vim /proc/meminfo
MemTotal: 20455792 kB
[root@133 systeminformation]# vim 10_httpd.py
#!/usr/bin/env python
import os
import subprocess
from subprocess import Popen,PIPE
def getPid():
p = Popen(['pidof', 'httpd'], stdout=PIPE,stderr=PIPE)
pids = p.stdout.read().split()
return pids
def parsePidFile(pids):
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(f):
with open(f) as fd:
for line in fd:
if line.startswith('MemTotal'):
total_mem = int(line.split()[1])
return total_mem
if __name__ == '__main__':
pids = getPid()
http_mem = parsePidFile(pids)
total_mem = total_mem('/proc/meminfo')
print "Apache memory is: %s KB" % http_mem
print "Total memory is: %s KB" % total_mem
print "Percent: %.2f%%" % (http_mem/float(total_mem)*100)
[root@133 systeminformation]# python 10_httpd.py
Apache memory is: 435760 KB
Total memory is: 20455792 KB
Percent: 2.13%