Defining a Class — CLASSADD Statement

The CLASSADD statement defines a class of transaction initiators to the APPC/MVS transaction scheduler. CLASSADD defines the following characteristics for a class:

CLASSNAME(name): Class name
MAX(number): Maximum number of transaction initiators
MIN(number): Minimum number of transaction initiators
RESPGOAL(time): Response time goal for each TP in the class
MSGLIMIT(number): Maximum number of messages for the TP message log

At least one class definition is required for work that is assigned to the APPC/MVS transaction scheduler. If work comes in for a class that is not defined, the work is rejected.

Your installation should define classes based on the characteristics of the transaction programs that will run in a particular class. Programs in a class should have similar characteristics such as run-time, priority, schedule-type, and security. For example, you might define a class of transaction initiators for transaction programs that require SYSOUT processing. IBM® recommends that each multi-trans program have its own class.

Note: If your installation uses the APPC administration dialog to maintain TP profiles, add class names to the dialog non-display panel ICQASE00 to keep the class list current. For more information, see Customizing the Dialog.