Hi,
Calls are relatively simple.
They are the number of times in the time span selected that a:
- Business Transaction get a hit on the entry point
- Information Point is invoked (class & method)
- Database and remote services receive a request
- Queues get a message-in or a request-out
- Caches get a hit
- and so on ...
Calls per minute are the number of calls in the last minute. When you select the time selector in the GUI, AppDynamics sum up the number of calls in the period. For time spans <= 4 hours, granularity is 1 min. From 4 to 48 hs, data is summarized in 10 min intervals with the max, min, avg, sum and count of calls for the period. From 49 hs and up, data is summarized in 60 min intervals.
Hope it helps. Regards,
Luis