Controlling reply IDs for WTOR messages

Operators use an ID on the REPLY command to respond to WTOR messages. In CONSOLxx, you can also specify the maximum number (RMAX) for reply IDs to a WTOR message.

To specify the RMAX value, use the following keyword on the DEFAULT statement of CONSOLxx:

RMAX: Defines the maximum number of reply ids. The default is 99. It is suggested the you use a value of 9999 for RMAX.

z/OS MVS Initialization and Tuning Reference provides the range of values for RMAX.

Note:

Set a value of 9999 for the RMAX parameter on the DEFAULT statement in the CONSOLxx parmlib member (if possible) for optimal performance.
When a sysplex is configured with a MAXSYSTEM value greater than 8, reply IDs are no longer assigned in strict sequential order. Instead, systems obtain groups of reply IDs for assignment to WTORs, and the ids might not be assigned in sequential order. This change requires no coding changes on the installation's part, but might surprise an operator. You should consider informing operators of this change.