[mrtg] Re: Interpretation question

Paul C. Williamson pwilliamson at mandtbank.com
Wed Nov 21 14:37:36 MET 2001

>From the looks of the graph, I can't imagine you are tracking 
the same OID.  I'm guessing that the blue has something to 
do with the available CPU or something?  If so, the massive dips 
make sense, because the CPU will be used occasionally.  You 
are just polling it at exactly the time the CPU is being utilized. 
If they are the same OID, why are they on opposite sides of 
the graph?


>>> "Thurston, David" <DThurston at mvusd.k12.ca.us> 11/20/01 07:24PM >>>
Hi All,

I've been running MRTG to monitor a number of instances on our NT/Cisco
network with great success, which in no small amount is due to all the
excellent info I glean from the users of this list. However, I am having an
interpretation problem with my NT 4.0/2K CPU graphs. As far as I know,
Microsoft only provides a single OID entry for monitoring CPU:
. Of course, I'm adding the OID
twice, per the two OID requirements of MRTG.

I've attached on of my graphs, and as you can see I'm getting appropriate
data, which is represented by the green graph. What I don't know how to
interpret is the wild fluctuations of the Blue line. Why the sudden dips
that don't correlate to any outages? Now, I'm no statistician, but I don't
think the blue line is reporting data worth reading, and, well, it just
looks strange, which makes explaining it away slightly awkward.

Any advice?

David Thurston
MVUSD <<CPUexh-day.png>> 

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