The tables presented at www.ibm.com/servers/resourcelink/lib03060.nsf/pages/srmindex?OpenDocument show
the unweighted CPU service units per second by CPU model. You use
this information to define your minimum and maximum capacity for a
resource group.
Also, for the latest information
about the processor version codes and SRM constants, see the online
documentation available at the same location.
If you plan to use these constants for purposes other than those
suggested in this information, observe the following limitations:
- Actual customer workloads and performance may vary. For a more
exact comparison of processors, see the internal throughput rate (ITR)
numbers in Large Systems Performance Reference (LSPR).
- CPU time can vary for different runs of the same job step. One
or more of the following factors might cause variations in the CPU
time: CPU architecture (such as storage buffering), cycle stealing
with integrated channels, and the amount of the queue searching (see z/OS MVS System Management Facilities (SMF)).
- The constants do not account for multiprocessor effects
within logical partitions. For example, a logical 1-way partition
in an S/390 9672, Model RX3, has 1090 service units per second, while
a 10-way partition on the same machine has 839.3 service units per
second.