[python-win32] WMI Performance API

[Tim Golden]

[Erik Dahl]

| I want to use the WMI Performance API to collect performance  
| information from remote boxes.

The WMI stuff needs a certain amount of -- imho -- mildly
bizarre plumbing work. To save you the trouble, I've put
together a WMI module which I know a few people are using.

http://timgolden.me.uk/python/wmi.html

There isn't actually an example of the performance
counters on the cookbook page (have to do something
about that) but my usual advice is: find an example
from around the net -- there's loads of them -- and
then translate that example into Python. I'm happy
to help if there are any difficulties there.

Possible places to start looking:

http://www.activexperts.com/activmonitor/windowsmanagement/wmi/samples/p
erformancecounters/
http://groups.google.com/group/microsoft.public.win32.programmer.wmi?lnk
=lr

I've just found a not-too-complex example I implemented
here in the past. Entire code posted below (sorry for the
length):

<code>
import os, sys
import operator
import time

import smtpmail
import wmi

THRESHOLD = 30.0
BEST_OF = 3

SERVER = "voctx1"

try: server = sys.argv[1]
except IndexError: server = SERVER

print "Looking on", server, "for processes running over", THRESHOLD, "%
for more than", BEST_OF, "secs"

c = wmi.WMI (wmi=wmi.connect_server (server=server, user=r"username",
password="password"))
## c = wmi.WMI ()
session = smtpmail.smtp_session ()

process_info = {}
while 1:
  items_shown = False
  for p in c.Win32_PerfRawData_PerfProc_Process ():
    id = long (p.IDProcess)
    n1, d1 = long (p.PercentProcessorTime), long (p.Timestamp_Sys100NS)
    n0, d0, so_far = process_info.get (id, (0, 0, []))

    try:
      percent_processor_time = (float (n1 - n0) / float (d1 - d0)) * 100
    except ZeroDivisionError:
      percent_processor_time = 0
    if len (so_far) > BEST_OF:
      so_far.pop ()
    so_far.append (percent_processor_time)
    process_info[id] = (n1, d1, so_far)

    average_processor_time = reduce (operator.add, so_far) / len
(so_far)
    if (len (so_far) >= BEST_OF) and (average_processor_time >
THRESHOLD):
      for process in c.Win32_Process (Handle=id):
        domain, return_value, user = process_owner = process.GetOwner ()
      ## print domain, return_value, user

      alert_text = "%s running at %d on %s (%s)" % (p.Name,
average_processor_time, server, user)
      smtpmail.send (
        recipients=["goldent"],
        subject=alert_text,
        message_text = alert_text,
        session=session
      )
      print str (id).ljust (6), p.Name.ljust (20),
average_processor_time
      items_shown = True

  if items_shown: print
  time.sleep (1)

</code>

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________