Documentation for all the Usage data metrics.
The following discussion from !14666 (merged) should be addressed:
Although, I can see we're returning
ActiveRecord::StatementInvalidis thrown. Do we have documented somewhere that the return of
-1indicates the query is expensive and it can't be executed? Or how to the users know there's something wrong going on?
Didn't find any issue regarding the documentation of all the metrics added as part of telemetry#39 (closed), so created this one. Please feel free to close it if it's a duplicated of another one.