HP-UX Workload Manager Toolkits User's Guide

HP-UX WLM Duration Management Toolkit and HP-UX WLM Toolkit for Base SAS Software

How do I use DMTK / SASTK?

Chapter 6 137

Example express lane: CPU utilization goal

The last example

(/opt/wlm/toolkits/duration/config/expressconf_usage.wlm) shows an

express lane based on an SLO with a CPU usage, or utilization, 7goal.

Recall that a usage goal tries to keep the workload’s CPU utilization of

its allocated CPU resources within a certain range—by changing the

amount of CPU resources allocated.

# Name:

# expressconf_usage.wlm

# Version information:

# $Revision: 1.9 $

# Caveats:

# DO NOT MODIFY this file in its /opt/wlm/examples/wlmconf location!

# Make modifications to a copy and place that copy outside the

# /opt/wlm/ directory, as items below /opt/wlm will be replaced

# or modified by future HP-UX WLM product updates.

# Purpose:

# Demonstrate an express lane that has a usage goal. Express lanes

# allow applications to finish more quickly.

# A WLM workload group is needed to handle special queries from the

# marketing department. These special requests are very important

# and must be completed as quickly as possible. However, care must be

# taken with regard to the impact on the other services. From past

# experience, running these special processes in a group with CPU

# allocations based on the actual resource usage give the best

# response characteristics. This workload group only receives CPU

# when it has active processes.

# Components:

# The glance toolkit is used. See glance_app(1M) for more

# information on the glance data collectors.

# Allocation change frequency:

# Because these jobs are relatively short in nature, the default

# wlm_interval (60 seconds) is too long. We change the interval to 5

# seconds to minimize the time before WLM adjusts the CPU allocations.