Guidelines for Processor Utilization
These guidelines are shown in the ‘FACTS’ at the bottom of most graph pages.
Total Utilization Guidelines
These are the processor utilization guidelines that are used to determine if a resource is ‘OK’,
marginal, or ‘critical’. They are based on the number of processors that are configured for the
server/LPAR.
‘Average’ by definition indicates the average utilization for all hours in the shift for the measured
days in the period. ‘Peak’ average indicates an average of the two busiest hours during the shift
for the measured days in the period. If a measurement exceeds the marginal percentage in the
table, then the particular resource being measured should be given attention in the near future. If
a measurement exceeds the critical percentage, then immediate attention should be given to the
system resource being measured.
Interactive Utilization Guidelines
The Processor – Interactive Capacity guidelines are based on the following table:
Guideline for Interactive Utilization
Average Marginal = 70%
Average Critical = 90%
Peak Marginal = 80%
Peak Critical = 100%
The average and peak values are expressed as a percentage of the interactive capacity of the
system and not the total processing capacity. This allows you to monitor specifically for an
interactive capacity constraint, and not just the total system.
The processor interactive capacity chart represents the utilization depending on the System i
model you have, for example:
Models that have interactive feature cards and provide a somewhat limited interactive
processing capability
Systems that do not implement the interactive feature card, such as the Enterprise
Edition models. The values shown for these types of systems are for interactive work
(Jobtype = I). They are expressed as a percentage of the total processing capability of
the system or partition.
PM for Power Systems Graph Reference Document
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