PI Analysis Performance Checker
Currently PI Analysis Service has a built-in Statistics tool in PI System Explorer.
It is able to show statistics regarding Evaluation and Calculation Lag as well as Skipped Evaluations and some other important information.
PI System Explorer could run these statistics periodically and notify the user (in the Management tab or in the Analysis tab itself) whenever a PI Analysis has its parameters out of certain values (could cause a bad performance)
So that the users could avoid performance issues more easily.

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We are aware of the need to provide PI Analysis Service performance information but it's unlikely we would do that in PI System Explorer. PI System Explorer does not have a persistent connection to the services and it's not a notifications tool. As with all operations in PI System Explorer, you need to refresh the client manually to get updates. Having said that, we have exposed additional PI Analysis Servicer run time information via the AF SDK in recent releases and hope to put together improved methods for users to track service performance.