I have two different meters reporting values:
Meter A: Items looked up against data store Meter B: Items returned from data store
I want my chart to also have a composite metric that just tracks the difference between these two values for easy observation. However, I'm struggling getting Librato to report this value properly.
What I have at this point is based on the subtract
example here: http://support.metrics.librato.com/knowledgebase/articles/354670-composite-metrics-language-tutorial
However, the results it reports are a scale factor off of the real number. It seems the number it reports is the actual number divided by some number, which may be the number of separate sources reporting the value.
For instance Metric A = 100 items Metrics B = 50 items Composite = 25 items ?? (seems to be off by factor of 2)
The factor changes depending on the specific datapoint.