|What's new in RMF for z/OS Version 1 Release 9|
Support of HiperDispatch mode
The CPU Activity report provides the low, medium or high logical processor share for systems running in HiperDispatch mode.
Extended crypto activity reporting
The reporting about crypto activity is extended. On System z10® EC processors, the Integrated Cryptographic Service Facility (ICSF) exploits SHA-384 and SHA-512 hashing. RMF enhances the Crypto Hardware Activity Report to provide combined measurement data for these hashing algorithms.
Measurements about WLMs blocked workload promotion
If the CPU utilization of a system is at 100%, workloads with low importance (low dispatch priority) might not get dispatched anymore. This could cause problems if the work holds a resource and by that holds up more important workloads. Therefore, any address space or enclave which has ready-to-run work units, but does not get CPU service within a certain time interval due to its low dispatch priority, will be temporarily promoted to a higher dispatch priority.
RMF supports this function by reporting relevant measurements in the new Blocked Workload Promotion section of the Postprocessor CPU Activity report. The Postprocessor Workload Activity report provides the CPU time, that transactions of a certain service or report class were running at a promoted dispatching priority.
In addition, RMF provides new overview conditions for the Postprocessor based on SMF record 72-3.
Enhanced monitoring of FICON performance
The average number of concurrently active I/O operations is provided in the LCU summary line of the Postprocessor I/O Queuing Activity report if at least one FICON channel is connected to the LCU.
In HyperPAV mode, PAV-aliases are no longer statically bound to PAV-bases but are bound only for the duration of a single I/O operation. Thus, the number of aliases required for an LCU is reduced. This enables applications to achieve equal or better performance compared to the original PAV feature.
RMF supports this new feature by extending the following reports:
- The Postprocessor I/O Queuing Activity report shows information about HyperPAV activity.
- Several device related and delay related reports show the average number of assigned HyperPAV-aliases.
New coupling facility measurements
RMF provides additional data in the Monitor III Coupling Facility reports and the Postprocessor Coupling Facility Activity report. For example, the reports display CF utilization per structure and whether dynamic CF dispatching is turned on.
RMF also provides new measurements on CF processor utilization in the following Monitor III data reporter tables:
In addition, RMF provides new overview conditions for the Postprocessor based on SMF record 74-4.
RMF Spreadsheet Reporter enhancements
A new version of the Spreadsheet Reporter provides the following enhancements:
- The Workload Activity Trend report macro and the LPAR Trend report macro are enhanced to support measurements of zIIPs and zAAPs.
- The Workload Activity Trend report macro is enhanced to support report class periods.
- The Device Overview Report macro is enhanced to to provide a sysplex view of I/O performance.
- While the available macros could process only predefined sets of overview control statements so far, a new generic spreadsheet macro can now process any overview working set and present the data within a simple chart.
- A new XCF Trend Report spreadsheet macro is provided to process and report XCF performance data.
RMF CIM based monitoring
RMF provides new metrics to monitor processor utilization (including zIIPs and zAAPs), to measure disk activity and to retrieve information about the active WLM policy.