CSA Storage Allocation
We allocate enough storage in fixed ESQA to hold the SMF exits. Less than 100 KB is used for all resident modules.
ECSA usage:
- XPS PCB - 256 bytes
- XPS parameters - 272 bytes
- UCB list - 256 bytes
- Tracking queues - depends on parameter values
The tracking queues are allocated according to the PROCESS value in XPSPRMxx, unless they are overridden by the SETQUES parameter (JOB=jjj,MSG=mmm,DSN=ddd,WTO=mmm,EVT=eee). The values for each queue are the largest of the SETQUES, the default and the value calculated from the PROCESS parameter.
- JOBQ - 16+1024*(jjj+1)
- JOBQ index - jjj
- MSGQ - 16+126 *(mmm+1)
- DSNQ - 16+127*(ddd+1)
- WTOQ - 16+147*(mmm+1)
- EVTQ - 16+76*(eee+1)
| Queue | Calculated size | Default size | Default storage |
|---|---|---|---|
| JOBQ | ppp*4 | 120 | ~121K |
| MSGQ | ppp*64 | 1920 | ~236K |
| DSNQ | ppp*16 | 480 | ~60K |
| WTOQ | ppp*16 | 480 | ~69K |
| EVTQ | n/a | 240 | ~17K |