[mrtg] Re: Why does it work as a gauge but not a rate?

[Stieers, Ken]

By default MRTG does the following calculation and graphs it:

(new reading - old reading)/time elapsed

Options: absolute does the following:

New reading/time elapsed

Options: gauge does no calculations


Your results tell me that the difference between the old reading and the new
reading are very small, so the division by 300 (seconds in 5 min) comes out
less than 1.  Since MRTG only does integers, you get 0.  You might want to
look at the Perminute or Perhour options.


HTH, 

Ken 


> -----Original Message-----
> From: Joel Rising [mailto:rising at disappearing.com]
> Sent: Wednesday, July 26, 2000 6:32 PM
> To: mrtg at list.ee.ethz.ch
> Subject: [mrtg] Why does it work as a gauge but not a rate?
> 
> 
> Folks,
> 
> I am using MRTG to analyze some data from an application.
> My target in MRTG is a shell script which returns output
> like the following:
> 
> 460
> 0
> 0:17:11:40.00
> keys003
> 
> The first number is monotonically increasing, and the second
> is always zero.
> 
> When I use the "gauge" option, I get results in the log file,
> and a graph that shows the total.  If I do not use the "gauge" 
> option, the graph always shows zero, and the log file shows
> all its entries as zero, except for the top-most, which shows
> whatever the current value is.
> 
> Any idea how to start debugging this problem?
> 
> Thanks!
> 
> Joel
> 
> 
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