https://www.ibm.com/docs/en/ims/15.2.0?topic=ims-system-management-facility-ddcons-parameter-considerations
IMS 15.2 - System administration - System Management Facility DDCONS parameter considerations
The setting of the System Management Facility (SMF) DDCONS parameter should be reviewed to avoid possible processing delays, as described in APAR OY31613.
system administrationimsmanagementfacilityparameter