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The CAHCHECK address space is started automatically by the CAMASTER address space at IPL time and is intended to remain active for the duration of IPL. However, it can be shut down or recycled using operator commands.
You do not need to shut down the CAHCHECK address space before a scheduled IPL. The CAHCHECK address space will not prevent any other system component address space from shutting down.
No action is required to activate the CAHCHECK address space. That is, no JCL PROC, no security access rules, and no WLM policy requirements are required to run the CAHCHECK address space. The CAHCHECK address space does not require a security system user ID, unless your installation’s default started task user ID is defined to be suspended. If this is the case, then a started task user ID of CAHCHECK minimally must be defined to permit the CAHCHECK address space to start. The CAHCHECK address space executes like any other system component as a "Trusted User" authority. This means that CAHCHECK is permitted to access the libraries that contain the CA product health checks. It also means that any access to those libraries is logged. The CAHCHECK address space executes in the SYSSTC service class.
After the CAHCHECK address space is active, its services are available to CA products. When CA products register their health check routines in the CAHCHECK address space, those checks remain active until they are terminated either by the owning product or by an operator command. If the CAHCHECK address space is recycled, any CA Health Checks that were hosted before shutdown are re-registered automatically when the CAHCHECK address space is restarted.
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