[mrtg] Re: Monitoring Discards but not sure if I have to use absolute, gauge,

James Liakos James.Liakos at chubb.com.au
Fri Apr 2 10:43:38 MEST 2004

Great Peter sounds good.
But how do I do a perminute and/or perhour thingy...
What I would like to do it every 5 minutes Mrtg tell me how many
discards I had over the last 5 minutes (dont want this average
thanks in ad
	-----Original Message-----
	From: Peter Glanville [mailto:peter_glanville at cuk.canon.co.uk] 
	Sent: Friday, 2 April 2004 18:00
	To: James Liakos; mrtg at list.ee.ethz.ch
	Subject: Re: [mrtg] Monitoring Discards but not sure if I have
to use absolute, gauge,

	> I am graphing frame relay discards and seeing as the numbers
will always
	> increment, if I reboot the Router counters will go back to
zero but when
	> I snmpwalk they are increasing really slowly.
	> Q is which of these values do I have to use... Absolute, gauge
so I can
	> graph realistic figures instead of getting graphs that show
50k and so
	> forth which infact over the last 5 minutes my counters have
	> increased 20 or so 
	You do not want Gauge or Absolute, but may need perminute or
	Gauge does not divide by time, just plots the current value. 
	Absolute only uses the current value divided by time 
	Neither of these is correct for you. 
	Normally MRTG plots the difference between current and previous
reading divided by time and displays the result. This is what you want. 
	But if the change rate is less than one per second, you get zero
displayed. So monitor it every 5 mins, but get the display to show the
change as a rate per minute or per hour (which will be greater than one,
and therefore displayed) 

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