2. PERFORMANCE REPORTING ANALYSIS › 2.7 Graphic Analysis › 2.7.1 CPU Graphs › 2.7.1.4 CPU Busy by Workload Type - Pie Chart

2.7.1.4 CPU Busy by Workload Type - Pie Chart

GRAPHIC RESULTS

This graphic analysis provides a pie chart of the
distribution of processor utilization among major workloads.
Ordinarily you would describe the rules for grouping
particular service classes into certain workloads.  An
example of the method for defining workloads is available in
Section 2.7.6.3. If you do not provide such a method, each
service class will be displayed as a separate workload.

ANALYSIS GUIDELINES

This chart presents a high level overview for a major system
resource, CPU capacity.  With it you can show where your
leverage to manage utilization is by workload type.  Shifting
a workload to another processor might not relieve a processor
bottleneck if its relative percentage of the total
utilization is small.  Because this graph is a pie chart, the
displayed CPU utilization represents the percentage of total
CPU busy caused by each workload type.  This displayed
utilization is the relative share of CPU and not the total
amount.

The detailed behavior of workloads and the system influences
that may be affecting them can be further analyzed using the
sysplex analysis reports described in Section 2.8.

SPECIAL CONSIDERATIONS

If you do not provide a workload description, as shown in
Section 2.7.6.3, each service class will be treated as a
separate workload.  This may provide so many unique
categories that SAS/GRAPH will shift from using a pie chart
to using a horizontal bar chart.  While a horizontal bar
chart prevents the loss of information from the chart, you
will probably find analysis and reporting more meaningful if
you describe workloads.