Guys, thanks for all your responses<div>Tobi, I'll definitely try the ABSOLUTE data source</div><div>There's one thing more - I'm wondering about my RRAs and the most likely choice is the AVG aggregation that will give me an average frequency over larger periods of time. But this is not exactly what I'd like to have - SUM aggregation would be much better imho for this case because I'm interested mainly in total number of events per minute/hour/day, not the rate. So even if I use 5 minute resolution I'd like to see hourly and daily numbers of events in graphs. I know there's no SUM RRA but do you think adding it would be reasonable? Or maybe there's some trick to get SUM in effect of some clever data transformation?</div>
<div><br></div><div>R</div><div><br><div class="gmail_quote">On Sun, May 20, 2012 at 7:20 AM, Tobias Oetiker <span dir="ltr"><<a href="mailto:tobi@oetiker.ch" target="_blank">tobi@oetiker.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Rafal,<br>
<div><div class="h5"><br>
Yesterday Rafal Gwizdala wrote:<br>
<br>
> Hi,<br>
><br>
> Can rrdtool be used for measuring frequency of irregular events? I mean the<br>
> updates would occur in irregular patterns and I'd like to measure the<br>
> frequency of them / number of occurrences per some base interval.<br>
<br>
</div></div>if you use<br>
<br>
the ABSOLUTE data source type and rrdtool update whenever you<br>
detect one (or more events) with the number of events detected, you<br>
should get what you want.<br>
<br>
choose the step size according the the maximum resolution you want<br>
to see for the statistics.<br>
<br>
cheers<br>
tobi<br>
><br>
><br>
> Best regards<br>
> RG<br>
><br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland<br>
<a href="http://it.oetiker.ch" target="_blank">http://it.oetiker.ch</a> <a href="mailto:tobi@oetiker.ch">tobi@oetiker.ch</a> <a href="tel:%2B%2B41%2062%20775%209902" value="+41627759902">++41 62 775 9902</a> / sb: -9900<br>
</font></span></blockquote></div><br></div>