HP-UX 11i Version 2 March 2006 Release Notes

General System Administration
HP Partitioning
Chapter 5
104
HP-UX Workload Manager
HP-UX Workload Manager (WLM) A.03.01 provides goal-based workload management.
This management enables automatic resource allocation and application performance
management through the use of prioritized service-level objectives (SLOs). It provides
this functionality by automating features of HP-UX Virtual Partitions (vPars),
1
nPartitions, Processor Sets (PSETs), and HP Process Resource Manager (PRM).
2
Summary of Change
WLM has been updated to version A.03.01 with the following changes:
• No longer requires PRM to be installed (without PRM, WLM can manage nPartitions
and virtual partitions)
• Process maps, which allow you to define your own criteria for placing processes in
workload groups rather than using WLM’s default criteria (apps, users, or scomp
records)
• Extended shares that allow for more precise allocations as well as smaller minimum
allocations
• Extended groups, which allow you to define up to 256 workload groups (patch
PHKL_32518 is required and can be obtained at the HP IT Resource Center at
http://itrc.hp.com)
• Can now manage PSETs inside virtual partitions (vPars 4.x or later required) and
nPartitions (HP Instant Capacity v7 or later required)
• Works inside HP Integrity Virtual Machines
• Additional metric information is available through EMS
•The wlm_watch.cgi script provides wlmd -C and wlminfo proc data
• Integration with HP Pay per use v7
• Enhanced memory management
Impact
The changes in this release have the following impacts:
• More flexibility in process placement
• More workload groups
• More management combinations
Compatibility
There are no known compatibility issues.
Performance
Performance is improved when WLM is used properly, but can degrade when WLM is not
configured appropriately.
1. See also “HP-UX Virtual Partitions” on page 102.
2. See also “HP Process Resource Manager” on page 101.