HP-UX Workload Manager User's Guide

Configuring WLM
Tuning the metrics and the SLOs
Chapter 5 217
• Minimize the effect of changes in the number of
available CPU resources (due to WLM
management of vPar, Instant Capacity, Temporary
Instant Capacity, and Pay per use resources)
For example, the following global tune structure sets the interval to 15
seconds:
tune {
wlm_interval = 15;
}
Using absolute CPU units
With the absolute_cpu_units tunable, you can control whether the
CPU units used by the following keywords/tunables are absolute or
relative:
• mincpu
• maxcpu
• gmincpu
• gmaxcpu
• cpushares
• cntl_kp
• cntl_convergence_rate
With absolute CPU units enabled (absolute_cpu_units = 1), you
specify CPU units in terms of 100, where 100 represents an entire core.
So, if you want a mincpu of half a core, you would specify:
mincpu = 50;
If you want a maxcpu of two cores, you would specify:
maxcpu = 200;
Absolute CPU units are used when the number of active CPU resources
changes due to WLM management of Instant Capacity, Temporary
Instant Capacity, Pay per use, or Virtual Partitions resources. Regardless
of the number of active cores, the absolute CPU units represent the same
amount of CPU resources. HP recommends using absolute CPU units.