Classic event subsystem resource management

The Event System Service (aahEventSvc.exe) manages all of the system resources required to detect events and process actions. System resources are allocated for detectors and actions by means of threads. A thread is an operating system component that independently performs a particular function within a larger process. Within the overall process of the Classic Event subsystem, event detectors and actions are assigned different threads, so that they can execute independently of each other and thus perform more efficiently.

The Classic Event subsystem uses two thread groups, or "pools." One thread pool is for detectors and the other one is for actions. The Event Service automatically creates both of these thread pools if there is at least one event tag defined.

Other aspects of resource management include the number of database connections required by event system components, and how the system handles event overloads and query failures.