graphite-dev team mailing list archive

[Florin Andrei <florin@xxxxxxxxxxxxxxx>]

When graphing multiple metrics at once, and the metrics are counters 
that require derivative(), always do derivative() before sumSeries(). If 
you put sumSeries() before, and there are gaps in some metrics, the gaps 
will show as huge spikes in the result. Placing derivative() as the 
first function kills the spikes.

I had this issue today and it was quite puzzling, before I realized 
what's going on. Would be nice if someone made an observation in the 
docs, next to one of these functions. ;)

--
Florin Andrei
http://florin.myip.org/