Python – Find RAM usage for highest HTTP process and calculate MAXClients setting.

maxclient.py

#!/usr/bin/python
import os
import psutil
import subprocess
import time
 
'''
if os.exists("/etc/redhat-release"):
    process = "httpd"
else:
    process = "apache2"
'''
 
pids = [int(pid) for pid in os.listdir('/proc') if pid.isdigit()]
http_proccess = []
for elements in pids:
    p = psutil.Process(elements)
    p.name()
    p.memory_info_ex()[0]
    if p.name() == 'apache2':
        #print p.name(), p.memory_info_ex()[0]
        http_proccess.append(p.memory_info()[0])
        process = p.name()
        apache_status = True
    elif p.name() == 'httpd':
        #print p.name(), p.memory_info_ex()[0]
        http_proccess.append(p.memory_info()[0])
        process = p.name()
        apache_status = True
    else:
        pass
 
print "--------------------------------------------------"
http_largest_hog = float((max(http_proccess) / 1000000.0))
print "Largest ", process, " process is ",  round(http_largest_hog, 10), "MBs"
 
free_memory_proc = float(psutil.virtual_memory().free) / 1000000.0
print "Free memory with ", process, " running",round(free_memory_proc,10), "MBs"
if apache_status == True:
    subprocess.call('service apache2 stop', shell=True )
    time.sleep(10)
    print "Processing...."
else:
    pass
 
free_memory_Noproc = float(psutil.virtual_memory().free) / 1000000.0
print "Free memory with out ", process, " running",round(free_memory_Noproc,10), "MBs"
 
ram_gained =  free_memory_proc - free_memory_Noproc
print "RAM Gained after ", process, "terminated: ",ram_gained, " MBs"
 
apache_maxClients = ram_gained / http_largest_hog
print "Adjust Apache MAXCLIENTS parameter at ", apache_maxClients