Insights into Peak 4HRA Data in SCRT with IntelliMagic Vision

IntelliMagic Vision provides visibility into peak 4HRA data far beyond what is provided by IBM’s Sub-Capacity Reporting Tool (SCRT) to enable you to reduce MLC expense.

View the following video for an example of that visibility.

Reduce 4HRA / R4HA Without Impacting Application Performance

Managing CPU consumption during peak intervals as reflected in the 4-Hour Rolling Average (or Rolling 4-Hour Average) is crucial to reducing software expense without impacting application performance.

IntelliMagic Vision provides visibility into 4HRA MSU values for the highest 20 intervals by product by billing month for both CMP and CEC-based environments, with direct drilldowns into CPU consumption during those peak intervals.

The integration here of Usage (SMF 89) and address space (SMF 30) data shows which address spaces are registering which products, supporting several significant use cases.

MSUs over Time

This graphical view displays SCRT MSU values by product over the selected time interval, which will commonly be a billing month. From this view several data items that aid SCRT analysis are immediately apparent, including monthly peak values by product, when they occurred, how much higher the peak was than other time intervals, and the relative relationships between MSU consumption of different products.

MSUs Over Time

drilldown into msus by system

Drilldown to MSUs by System

From the “MSUs Over Time” view several drilldowns are available to examine the MSU contributions for that product of subsets of the infrastructure, including by CEC, by LPAR, and by system (shown here). Usage data is referenced to report only on systems where the selected product was executing.

Peak MSUs (table)

The previously described information is also available in a tabular format. In addition to the peak MSU consumption for the billing month, this initial view also identifies the interval when the peak occurred, and whether soft or group capping was in effect during that peak interval.

There are separate tables reflecting the distinct values for Country Multiplex Pricing (CMP), shown here, and legacy SCRT with separate peak intervals by CEC.

Peak 4hra MSUs by billing month table format

Monthly peak 4hra MSUs by billing month used for Monthly License Costs (top 20 intervals)

Top 20 Intervals (excerpt)

The drilldowns available from the SCRT tables include this display of the top 20 intervals, enabling analysis of how much higher the peak was than the next highest intervals during the month.

CPU Use during Peak 4HRA Interval

One common line of inquiry for SCRT analysis is to understand the workload that was executing during the peak interval, so that any opportunities to reschedule work outside of non-peak intervals can be identified. From the graphical view the “MSUs at Time” drilldown takes you directly into a view of the CPU consumption during the selected 4-hour interval.  From there all the powerful CPU analysis capabilities of IntelliMagic Vision are available, to further drilldown by system, by workload, by WLM importance level, by service class, by report class, and ultimately by address space.

CPU use during Peak 4hra Interval

CPU use by WLM importance

Drilldown to CPU Use by WLM Importance

Illustrating the drilldowns for CPU analysis described in “CPU Use during Peak Interval,” this view displays the workload by WLM importance level when that drilldown is selected. If this interval represented a monthly peak, this view might prompt further analysis of the sizable Discretionary workload executing during this time (see “Key Feature 7” below).

Drilldown to CPU Use by Address Space

As suggested in “Drilldown to CPU Use by WLM Importance,” this drilldown allows you to see the specific address spaces classified by WLM as discretionary that were executing and thus contributing toward the four-hour rolling average value during that interval.

CPU use by address space

monthly peak 4hra time of day profile of product MSUs

Monthly Time-of-day Profile of Product MSUs

The “Month” drilldown provides a time of day profile across a selected month (likely to be a billing month in this case). This view presents average values (green line), minimum and maximum values (yellow bars), and 10th and 90th percentile ranges (green bars). Since workload profiles are often very different between weekdays and weekends, additional options allow you to narrow the analysis to those periods.

This view of the time of day profile for weekdays over the billing month shows at a glance the degree of variability both by time of day and across the weekdays in this month.

Time-of-day Profile of Product MSUs by Date

Another of IntelliMagic Vision’s powerful analytical capabilities particularly valuable for SCRT analysis is the “By Date” drilldown. This also provides a time of day profile over the selected interval, but in this case each day is represented by a separate line. This view visualizes how much higher the peak value was than the next set of highest peak values and when they occurred, both by date and by time of day.

time of day profile of product MSUs by Date

Time-of-day Profile of Product MSUs by Day of Week

Time-of-day Profile of Product MSUs by Day of Week

The view provided by this “Day of Week” drilldown can also help quickly identify any variances (or not) of the 4HRA profile for a selected product across the various days of the week.

No-obligation MLC Reduction Assessment

Software costs consistently dominate the budget for mainframe installations of which processor cache efficiency can have a significant role in reducing. However, according to our recent survey, 88% of sites have not optimized their processor cache utilization. Get in touch with one of our experts to determine if your site has potential MLC savings.

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Areas Supported by IntelliMagic Vision for z/OS

Systems, Processors & MLC

Systems, Processors & MLC

Continual visibility into how the z/OS systems infrastructure is handling your workloads helps you improve performance and protect availability.
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Db2, CICS, WebSphere, TCP/IP & MQ

Db2, CICS, WebSphere, TCP/IP & MQ

Unprecedented visibility into the extensive metrics provided by critical z/OS subsystems to enhance availability and analyze performance.
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Disk, Tape & Virtual Tape

Disk, Tape & Virtual Tape

Industry-leading visibility and expertise to analyze and proactively identify potential I/O issues in your disk and virtual tape and replication architectures.
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