HP-UX Workload Manager User's Guide

Configuring WLM
Defining SLOs
Chapter 5 193
• The underscore character (_), as long as it is not the first character
• The hyphen character (-)
• The period (.)
•Quoted characters
Any characters not listed here (except the double quote) can be used
as long as they are enclosed in double quotes. The slash character (/)
is not allowed, even when quoted.
The SLO name cannot exceed 216 characters.
Specifying the priority (required)
WLM uses SLO priorities to determine CPU allocation when the
combined CPU resource requests of all SLOs exceed 100%. In these
cases, SLOs with higher priorities (priorities closer to 1) are granted
CPU resources first. Use the pri keyword to assign priorities.
The pri keyword is required.
Specify an SLO’s priority using the following syntax:
pri = priority;
where
priority Is an integer greater than or equal to 1. The value of 1
is highest priority.
If there are any CPU resources remaining after WLM has met all the
requests, the remainder is given to the OTHERS group by default. You can
ensure that this remainder is given to more critical workloads by using
stretch goals—assigning a high and a low priority to each workload and
setting the low priority SLO to be more aggressive than the high priority
SLO. Consequently, the low priority SLOs seek out the excess CPU
resources. For more information on stretch goals, see “Goals vs stretch
goals” on page 203.
Table 5-5 illustrates the idea.
Table 5-5 Capturing remaining CPU resources with stretch goals
Workload SLO priority
Sales 1