Per-actor metric
Per-actor metrics calculate how many times an event occurs during a specified period of time. For example:
How many times per day callers hang up while waiting on hold
Number of users were active out of a 7 day period
Number of unique products a user has viewed over the last year
Scuba displays per-actor metrics as metric <metric name> in lists.
Scuba enables you to create per-actor metrics in a number of ways. You can use create queries to measure metrics to analyze the characteristics of different actors, or filter to compare subsets of actors based on ad-hoc criteria.