
522 DS8800 Performance Monitoring and Tuning
14.11 RMF
Resource Management Facility (RMF), which is part of the z/OS operating system, provides
performance information for the DS8000 and other disk subsystems for the users. RMF can
help with monitoring the following performance components:
I/O response time
IOP/SAP
FICON host channel
FICON director
Symmetric multiprocessing (SMP)
Cache and nonvolatile storage (NVS)
FICON/Fibre port and host adapter
Extent pool and rank/array
14.11.1 I/O response time
The RMF DIRECT ACCESS DEVICE ACTIVITY report (see Example 14-1) is probably the
first report to use to monitor the disk subsystems perfor ...