Extended Events offers a rich filtering mechanism, called predicates, that allows you to reduce the number of events you collect by specifying criteria that will be applied during event collection. By evaluating predicates early in the event firing sequence, we can reduce the performance impact of collecting events by stopping event collection when the criteria are not met. You can specify predicates on both event fields and on a special object called a predicate source. Applying predicates on predicate source you can customize your collection and answer the critical questions very quickly.
In this demo session, I will show you how you can collect only the nth number of events. You can also use this trick to stop a collection automatically when you are only looking for if an event is occurring or no?
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