HP-UX Workload Manager User's Guide

Introduction
Performance and resource management overview
Chapter 136
After determining which methods you want to use for monitoring
performance and resource utilization, decide how to control performance
and resource utilization. Table 1-2 examines the advantages and
disadvantages of various control methods.
Table 1-2 Performance controlling methods
Method Advantages Disadvantages
One workload per server • Workloads do not
compete for resources
• Server resources sit idle
a large percentage of the
time
Multiple workloads:
No resource management
• Increased resource
usage
• Fewer servers needed
• Workloads compete for
resources
• A single workload may
take over the server,
preventing other
workloads from getting
resources
Multiple workloads:
Fixed resource allocation
Example:
PRM with capping enabled
• Workloads’ resource use
cannot exceed resource
allocations
• A workload cannot take
over a server to the
detriment of other
workloads
• Consistent performance
when work stays
constant in a workload
• Excess resources can
easily be tracked with
PRM and GlancePlus
tools
• Performance may
degrade when
workloads cannot exceed
resource allocations that
are set too low
• Unused capacity cannot
be shared optimally if
resource usage is capped