Description: Starting with z/OS V1R13, RMF provides a new Postprocessor Serialization Delay report. If you do not need this report, you should turn off data collection for SMF record 72 subtype 5.
| Element or feature: | RMF. |
| When change was introduced: | z/OS V1R13. |
| Applies to migration from: | z/OS V1R12. |
| Timing: | After the first IPL of z/OS V2R1. |
| Is the migration action required? | No, but recommended if you do not want to collect SMF data for the Postprocessor Serialization Delay report. |
| Target system hardware requirements: | None. |
| Target system software requirements: | None. |
| Other system (coexistence or fallback) requirements: | None. |
| Restrictions: | None. |
| System impacts: | None. |
| Related IBM Health Checker for z/OS check: | None. |
Steps to take: Determine if you want to use the new Postprocessor Serialization Delay report. SMF data required for this report is gathered by default. If you do not want to use this report, you should suppress the SMF data collection for the new record type 72 subtype 5. You achieve this by specifying NOTYPE for this SMF record type in the SMF parmlib member SMFPRMxx.
Another method to suppress the data gathering of record 72.5 for the Serialization Delay report is to use the SUBSYS parameter in the SMFPRMxx parmlib member for the STC subsystem (started tasks, where RMF is one of them). To exclude data gathering for SMF record 72.5, specify SUBSYS(STC,NOTYPE(72(5)), ... ).
The SUBSYS specification overrides the SYS specification. So for example, if you have defined SYS(TYPE(...,72,...)) in your SMFPRMxx parmlib member, you can use SUBSYS(STC, NOTYPE(72(5))) to make exceptions to your SYS specification and just exclude gathering of SMF record 74.9 for started tasks like RMF.
Reference information: For details about specifying SMF data collection, see z/OS MVS Initialization and Tuning Reference