KM5_CPU_Loop_Warn

This situation detects when the value of all CPU, zIIP, and zIIP on CP using and waiting counts, divided by total sample count, is greater than 98.0%.

*IF *VALUE Address_Space_Bottlenecks.CPU_Loop_Index *GT 98.0

This situation indicates that address space CPU usage is high. A high value indicates either that the address space is in a CPU loop or that it is in a very CPU-intensive phase of processing. Examine each address space. If the application is known to be a heavy CPU user, then continue monitoring it. It may not actually be in a loop. If the address space is using unexpectedly large amounts of CPU, it is a candidate for cancellation. Note that very CPU intensive jobs may read high without being in a loop, so the CPU Loop Index value is a guide, not a guarantee.

This situation is refreshed once every 5 minutes, but a minimum of 10 minutes is used to calculate the loop index value. Any address space that reaches the 90% loop index value after 10 minutes and is considered either medium or low importance extend its calculation over longer time periods to avoid false positives. The extended refresh period and workload importance considerations makes false positives unlikely.