HP-UX Workload Manager User's Guide

Introduction
Performance and resource management overview
Chapter 1 37
Multiple workloads:
Variable resource
allocations based on usage
Example:
PRM without capping
enabled
• Workloads are
guaranteed resource
minimums and can
borrow unused
resources from other
workloads
• Increased level of work
is handled automatically
• Excess resources can
easily be tracked with
PRM and GlancePlus
tools
• Workloads get
resources, but
performance can still be
less than desired
• Over-performance
followed by typical
performance can cause
complaints
Multiple workloads:
Variable resource
allocations based on actual,
reported performance
Example: HP-UX WLM
• Consistent performance
levels are maintained
automatically
• Workloads can be
prioritized to ensure
that high-priority
workloads are
guaranteed CPU
resources as needed
• Excess resources can
easily be tracked with
PRM and GlancePlus
tools so that
high-priority workloads
are guaranteed the
available resources
• Cannot be implemented
immediately:
application performance
must be assessed first
• Getting performance
metrics for workloads
can be difficult; however,
WLM simplifies this
task with a built-in data
collector
Table 1-2 Performance controlling methods (Continued)
Method Advantages Disadvantages