Enabling RMF data collection

If you have configured IBM® Z OMEGAMON AI for z/OS to use RMF data collection for real-time or near-term history data collection, you need to perform the steps described in this section.

Ensure that the following RMF components are activated:
  • RMF Control Task (RMF)--one instance on each monitored system.
  • RMF Monitor III Gatherer (RMFGAT)--one instance on each monitored system.
  • RMF Distributed Data Server (GPMSERVE)--one instance per sysplex.

For near-term history data collection, an additional requirement is that at least one instance (two for redundancy and up to one instance on each monitored system) of the OMEGAMON Subsystem must be active per sysplex.

If RMF Collection has been configured, you must ensure that the RMF Distributed Data Server (DDS) is started and RMF Monitor III tasks are started in all LPARs in this sysplex so that the DDS can consolidate data from each LPAR. IBM Z OMEGAMON AI for z/OS and, for near-term history, the OMEGAMON subsystem (OB730 or higher) must also be enabled to connect to the DDS. This is done by enabling RACF's PassTicket service.

If IBM Z OMEGAMON AI for z/OS is configured to use coupling facility data collected by RMF, RMF Monitor III collection for coupling facility details (CFDETAIL) must be turned on. In RMF, collection is turned on by ensuring the Monitor III parameters in SYS1.PARMLIB(ERBRMFnn) have CFDETAIL set. Collection can also be turned on dynamically by issuing the following operator command: 

ROUTE *ALL,MODIFY RMF,MODIFY III,CFDETAIL
For more details, see Defining parameters for Monitor III in IBM z/OS Data Gatherer documentation.
If IBM Z OMEGAMON AI for z/OS is configured to use lock data collected by RMF, RMF Monitor III collection for LOCK must be turned on. LOCK can be set as the default in SYS1.PARMLIB(ERBRMFnn) or by using the dynamic command:
/MODIFY RMF,MODIFY III,LOCK
Note: It is suggested that SYS1.PARMLIB(GPMSRV00) specify CACHESLOTS(10) and that SYS1.PARMLIB(ERBRMFnn) specify DATASET(WHOLD(50)) for RMF III fixed pages (in MB) and WSTOR(128) for RMF III size in storage buffer (in MB)
The following topics describe the additional steps you must take to enable use of RMF data: