On May 14, 2008, at 3:48 PM, Palle L Jensen wrote: > Thanks for you response. I understand, but The question I had is why > are the > peaks that are showing on the daily and weekly graphs not appearing > on the > monthly and yearly graphs?
The RRD stores and graphs 1 point for every 5 minutes for the daily RRA. You see every data point on the graph, including the peaks. 1 10 20 5 6 8 ... Weekly RRA/graph shows 1 data point for every 30 minutes. The data must be normalized based on a Consolidation function. Typically that's Average so the above 5 minute intervals would result in a single data point of 8.33333 graphed and stored in the weekly RRA. 'Monthly' RRA/graph shows 1 data point for every 2 hours. The 30 minute data points above are once again averaged (or whatever the Consolidation function is) over the 2 hour interval and used to generate the monthly RRA and graph. 'Yearly' RRA/graph shows 1 data point for every day. The 2 hour intervals above are consolidated into one data point for the entire day. As you've discovered, there are other consolidation functions which are available but the RRD file must be told which will be used at creation time. Looks like the PNP guys included MAX for at least some of the RRA's. Alex Van Den Bogaerdt has written an excellent RRD Tutorial that covers this and much more at http://oss.oetiker.ch/RRDtool/tut/RRDtutorial.en.html . -- Marc ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
