Controlling WTO and WTOR message buffers

MVS™ places WTORs in buffers in virtual storage. MVS also places WTOs queued to MCS, HMCS or SMCS consoles in buffers in virtual storage. You can control the number of buffer areas for WTO and WTOR messages at your installation by using CONSOLxx.

To specify buffers for WTO and WTOR messages, use the following keywords on the INIT statement of CONSOLxx:

MLIM: Defines the maximum number of buffers the system uses for writing WTO messages; the default is 1500.
RLIM: Defines the maximum number of buffers the system uses for writing WTOR messages; the default is 10 for a single system. It is suggested that you use a minimum value of 99 for RLIM. For a sysplex, see the following description for RMAX.

z/OS MVS Initialization and Tuning Reference provides the range of values for MLIM and RLIM. You should use an MLIM value for WTO messages that is significantly larger than the RLIM value for WTOR messages.