Hi James, So in your graphs you are now plotting the MAX-values I assume. When more consolidation occurs (in the smaller graph), you will get a higher average as well as it may look for the highest value out of 4 data-points, while it's in the wider graph creates the average out of say the max of 2 datapoints.
I would strongly suggest sticking to the average-numbers (of the AVERAGE database)- as the max can be very confusing, and may be way of reality. You can however pull the Max-value from the MAX-database and display that under the graph. And if you don't consolidate the data as time goes, you don't really need to store a MAX- database either, as you can override how data is consolidated. DEF:ds0max=am18-temp_fahrenheit.rrd:ds0:AVERAGE:reduce=MAX And can get your max of max as: VDEF:ds0maxmax=ds0max,MAXIMUM Good luck! /Johan On Thu, 2013-12-19 at 15:14 +0000, James Bensley wrote: A user has emailed me off list to inform me that data is consolidated when you are drawing it into a graph, so this is like a second stage of consolidation. After storing the data and possibly consolidating it, the data is consolidated again if the graph you are producing doesn't have enough pixels to display the data you are attempting to pull from the rra's into a graph. That sounds logical and strait forward to me, so I have tested this. I have generated a graph using rrd tools on the CLI and uploaded it here; http://i.imgur.com/Z6KFON8.png I have generated another one but specified double the width and height for graph size, and uploaded it here; http://i.imgur.com/a43NGt6.png The min and max values are the pretty much the same but the average has changed. So this looks like my question is answered unless anyone else any any input on this? Many thanks, James, _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch<mailto:rrd-users@lists.oetiker.ch> https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
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