2.3.9 Notes regarding collection of processor information

The processor usage collected in a virtualized system might not yield the intended values. This is because the virtualized system divides up processor resources and dynamically allocates them to other logical partitions. For example, if significant amounts of processor resources are being used in a specific logical partition due to a heavy load, only limited processor resources might be available for other logical partitions.

Figure 2‒5: Case in which collected values differ due to dynamic resource changes

Note that if an application on a given logical partition is using a physical processor, jobs on other logical partitions might be forced to wait due to the operation. In this case, processor usage cannot be accurately ascertained.

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