The SUBTSKS system initialization
parameter specifies the number of task control blocks (TCBs) you want
CICS to use for running tasks in concurrent mode.
- SUBTSKS={0|1}
- Specifies whether there is to be a concurrent mode TCB so that
CICS can perform management functions as system subtasks.
- 0
- If you specify 0 (the default), CICS runs under the following
two TCBs:
- The quasi-reentrant mode TCB. CICS runs all user applications
under this TCB.
- The resource-owning mode TCB. CICS runs tasks that open and close
files under this TCB.
- 1
- If you specify 1, CICS runs under the two TCBs listed previously,
and uses an additional TCB, a concurrent mode TCB, to perform system
subtasking.