[mrtg] Re: Doing Some Math to Get Result

[Steve Rowe]

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?
>
>http://people.ee.ethz.ch/~oetiker/webtools/mrtg/reference.html#item_gauge

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.

Steve



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