[mrtg] Re: Doing Some Math to Get Result

Steve Rowe steve.rowe at sheridanc.on.ca
Thu Apr 10 19:43:59 MEST 2003

At 01:36 PM 2003-04-10, Steve Rowe wrote:
>At 01:05 PM 2003-04-10, Hunt, Jim wrote:
>>I am getting the number of messages delivered on the mail server as a
>>total number.
>>Let's say 7510
>>5 min. later 7515
>>How do I write an expression using MRTG to graph the 5 value rather than
>>7510, 7515...
>Wouldn't the gauge option address this?

Sorry, no it wouldn't.

MRTG by default will divide the difference between the current and previous 
value read by 300 to get the average over the last 5 minutes (300 
seconds).  Thus, in the example you give, the result would be less than 1 
and probably not graphed at all.  I believe that if you add "*300" to the 
end of the Target: line, it should undo the division and you will get the 
results you're looking for.


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