- Should be much less than DBM1 costs
- TCB/SRB ratios can vary depending on what the system is doing
- Logging is all SRB
- BSDS access and archiving are TCB
- Backout is BIG SRB…
Normally the total CPU costs charged to the System Services (master) address space are substantially less than that charged to the DBM1 address space.
While logging uses SRB mode, be aware that the entire cost of a backout gets charged to this address space in SRB mode.