The active SMDBASxx member provides the list of VSAM data sets that make up the different product databases. Refer to the MainView SRM DBAS keyword.
The storage performance options provide historical performance statistics for physical and logical DASD devices. For more information, see Storage performance.
The real time statistics options provide real-time performance statistics for both physical and logical DASD devices. This information enables you to take corrective action to prevent performance-related problems. For example, using the Real Time Statistics options, you can:
Identify best- and worst-performing volumes
Locate most active volumes
Monitor latency (waiting time)
Review cache efficiency (the number of misses, hits, and read/write ratios)
For more information, see Real time statistics.