Add support for calculated metrics to App Insights
I would like the ability to combine two metrics in a third, calculated metric. For example, I might want to create a "Custom Error Percentage" metric that divides custom errors per second by requests per second. I could then alert off an error metric that has been normalized for scale instead of one that's specifically tied to RPS.
Ketan Ghelani [MSFT] commented
We are working on enhanced version of the metric explorer, as part of our next major update. In the first rev, we have a number of new capabilities like filtering and segmentation. Calculated Metrics or formulas are on our roadmap, but I don't have exact timelines as to when. I expect us to be able to define the formulas and calculate dynamically at query time, that gives you more accurate representation of the formula / calculated metric over the time period.
Shashank Bansal commented
Besides alerts based on the calculate metric, this feature would be extremely relevant to get to a single dashboard (like the OI dashboard) through which we can drive service reviews etc.
Service availability is typically a combination of GSM availability numbers and some of the performance counters.