统计apache进程占用的物理内存
统计apache进程占用的物理内存# ps aux | grep httpd
root 136980.00.0 1856284356 ? Ss 17:12 0:00 /usr/sbin/httpd
apache 137050.30.1 293504 27340 ? S 17:12 0:00 /usr/sbin/httpd
apache 137060.30.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 137070.30.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 137080.30.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 137090.30.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 137100.30.1 293504 27328 ? S 17:12 0:00 /usr/sbin/httpd
apache 137110.30.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
apache 137120.30.1 293504 27324 ? S 17:12 0:00 /usr/sbin/httpd
root 138310.00.0 103320 908 pts/6 S+ 17:15 0:00 grep httpd
#使用pidof查看所有httpd的进程号
# pidof httpd
13712 13711 13710 13709 13708 13707 13706 13705 13698
# cd /proc/13698 #apache的主进称，其它都是子进称
# cat status
Name:httpd
State:S (sleeping)
Tgid:13698
Pid:13698
PPid:1
TracerPid:0
Uid:0000
Gid:0000
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 : from subprocess import Popen,PIPE
In : p=Popen(['pidof','httpd'],stdout=PIPE,stderr=PIPE)
In : p.stdout.read().split()
Out:
['13712',
'13711',
'13710',
'13709',
'13708',
'13707',
'13706',
'13705',
'13698']
测试
# 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())
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)
# 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
# vim /proc/meminfo
MemTotal: 20455792 kB
# 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())
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())
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)
# python 10_httpd.py
Apache memory is: 435760 KB
Total memory is: 20455792 KB
Percent: 2.13%
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