IBM SC34-7012-01 manual Start requests, Autoinstall for programs, Monitoring and statistics

Autoinstall for programs

If program autoinstall is enabled (PGAIPGM=ACTIVE), program, mapset, and partitionset resource definitions are installed from the CSD only if they were cataloged; otherwise they are installed at first reference by the autoinstall process.

All definitions installed from the CSD are updated with information from the warm keypoint in the system log.

CICS catalogs program, mapset, and partitionset resource definitions as follows:

vIf they are installed from predefined definitions in the CSD, either during a cold start or by an explicit INSTALL command, CICS catalogs the definitions.

vIf the PGAICTLG system initialization parameter specifies ALL, CICS catalogs all the autoinstalled program-type definitions, and these are reinstalled during the warm restart.

vIf the PGAICTLG system initialization parameter specifies MODIFY, CICS catalogs only those autoinstalled program-type definitions that are modified by a SET PROGRAM command, and these are reinstalled during the warm restart.

Start requests

In general, start requests are recovered together with any associated start data.

Recovery can, however, be suppressed by specifying explicit cold start system initialization parameters for temporary storage, interval control, or basic mapping support (on the TS, ICP, and BMS system initialization parameters respectively). Any data associated with suppressed starts is discarded.

The rules governing the operation of the explicit cold requests on system initialization parameters are:

vICP=COLD suppresses all starts that do not have both data and a terminal associated with them. It also suppresses any starts that had not expired at shutdown. This includes BMS starts.

vTS=COLD (or TS main only) suppresses all starts that had data associated with them.

vBMS=COLD suppresses all starts relating to BMS paging.

Start requests that have not been suppressed for any of the above reasons either continue to wait if their start time or interval has not yet expired, or they are processed immediately. For start requests with terminals, consider the effects of the CICS restart on the set of installed terminal definitions. For example, if the terminal specified on a start request is no longer installed after the CICS restart, CICS invokes an XALTENF global user exit program (if enabled), but not the XICTENF exit.

Monitoring and statistics

The CICS monitoring and statistics domains retrieve their status from their control records stored in the global catalog at the previous shutdown.

This is modified by any runtime system initialization parameters.

Chapter 5. CICS warm restart 57