For detailed explanations about what to do when a CMEM‑related parameter is changed, see the INCONTROL for z/OS Installation Guide: Installing and INCONTROL for z/OS Installation Guide: Upgrading.
The CMEM‑related parameter member is member IOACPRM in the IOA PARM library.
The CMEM subsystem is triggered by the following messages:
IEF403I - Job started.
IEF125I - TSO user logged on.
$HASP100 (under JES2), IAT6101/IAT6100 (under JES3) - Job on header.
These messages must be issued for all jobs. However, if these messages must not be displayed on the console, they can be suppressed using member MPFLSTnn in the SYS1.PARMLIB library.
