HP-UX System Administrator's Guide: Overview HP-UX 11i v3 (B3921-90011, September 2010)

Processes and users are assigned to PRM Groups. The PRM Groups are then allocated dedicated
cores and memory. This both dedicates resources to the groups and isolates the group’s members
from using other system resources.
Tools to Administer/Configure
The Process Resource Manager can be configured using the HP System Management Homepage
or from a series of PRM management and configuration commands.
How to Obtain
The Process Resource Manager is included in the following operating environments or can be
purchased from an HP authorized reseller:
• BOE - Base Operating Environment
For Further Information
Detailed information about the Process Resource Manager is available on HP’s web site from:
• The document: HP Process Resource Manager User's Guide on http://www.hp.com/go/
hpux-core-docs.
• The official Process Resource Manager web site: http://www.hp.com/go/prm
Workload Manager (WLM)
The Process Resource Manager allows you to manually dedicate resources to specific applications.
However, many factors are likely to change constantly, such as system load, resource utilization,
resource needs, and the mix of applications that are running at any given time. If the conditions
and needs of your server environment are constantly changing, WLM can continuously monitor
and adjust resources to maintain application performance and business goals.
Technology Summary
Workload Manager (WLM) is an automatic resource management tool used for goal-based
workload management. A workload is a group of processes that are treated as a single unit for
the purposes of resource allocation. For example, a database application that consists of multiple
cooperating processes could be considered a workload.
WLM provides automatic resource allocation and application performance management through
the use of prioritized Service Level Objectives (SLOs). Multiple prioritized workloads can be
managed dynamically on a single server based on their reported performance levels.
WLM manages workloads as defined in a configuration file. You assign applications and users
to workload groups. WLM automatically allocates processing core resources to achieve the
desired SLO. WLM can manage real memory and disk bandwidth but not in response to SLOs.
With real memory, WLM allows you to specify lower and upper limits on the amount of memory
a workload receives. You can statically assign disk bandwidth shares. If multiple users or
applications within a workload are competing for resources, standard HP-UX resource
management determines the resource allocation.
Tools to Administer/Configure
The Workload Manager can be configured manually using a configuration file and WLM
commands, interactively using the WLM configuration wizard, or by using the WLM graphical
user interface.
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