A little mystery (for me, hopefully not for you ). I’m experimenting with a rule to create average/ trends configurable with tags. Well work in progress but behaves like expected in the first hour. It takes an quantifiable item (numeric:power) and calculates and average and a reference (also (numeric:power). This to make (yeah a little timeshifted) graphs with let’s say a five minute average compared to the period middle (2,5 minute behind) actual value. Image for the last hour (so the 10 second values in rrd4j). Blue line original data, yellow the ‘timeshifted’ value and green the average.
I would expect this to do (more or less) the same for older periods. rrd4j (default settings) will sum up the 10 seconds to a minute values by averaging them (since it’s quantifiable items). I would expect sometimes a 10 sec value just to be in the next or previous ‘bucket/bag’ so little differences. What I’m getting is this:
So huge differences between the yellow reference and blue original data. The peaks could be smeared a bit, but they’ve completely gone. Only thing I can think of it uses the default numeric option which is last value instead of averaging them. But according to documentation this shouldn’t happen.
Don’t know if relevant but I’m running on the 3.4.0 version. And as said, default settings for rrd4j (so no configuration files present).
Anyone know what I’m missing?!?