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Measurements about WLM’s 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.
HyperPAV support
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:
- ERBCFAT3
- ERBCFOT3
- ERBCFST3
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.
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