To maintain system availability at an optimal level all the time, TASM provides various tools to accomplish it. We have filters defined to block any request from coming onto the system, throttles to limit the number of requests coming onto the system, and then we have exceptions on the system. Exceptions are used to control any active work on the system. Once a query is active, there should be some way to control it; this is where exceptions come into play.
Exceptions make sure that any request/query that is active on the system is controlled, and if at any step it crosses the threshold, it needs to be controlled, as a query has many steps and sometimes till run time we don't know actual resource consumption of the request. But once it starts consuming resources, it needs to be monitored.
Using exception processing, TASM can detect when an individual query crosses a defined threshold so that a targeted action can be taken with regards to the request.
In this recipe...