HP-UX Workload Manager User's Guide

Introduction
Why use Workload Manager?
Chapter 146
• Disk bandwidth (within single HP-UX instances only)
Ensures that each workload group is granted at least its share of
disk bandwidth.
• Memory (within single HP-UX instances only)
Ensures that each workload group is granted at least its minimum,
but (optionally) no more than its capped amount of real memory.
In addition, WLM has an application manager that ensures that the
following specified processes run in the appropriate workload groups:
• Applications and their child processes
• User processes
• Secure compartment processes
• Any processes that meet criteria specified in a process map
Why use Workload Manager?
The traditional open systems usage model has been one application
running per server, which leads to surplus capacity per server and a
proliferation of servers with too many servers to manage. Typically, each
server is sized to provide headroom for peak capacity and future growth.
As servers are introduced into this traditional environment, surplus
capacity grows without providing any opportunity to share this excess
capacity among the applications.
WLM, in collaboration with other HP Virtual Server Environment tools,
significantly lessens the need to provide the same degree of surplus
capacity. WLM allows the surplus capacity to be shared among multiple
applications on the same system. You can configure WLM to ensure that
each application runs at the performance level required to meet your
business goals. By enabling you to consolidate your data centers and
multiple applications onto fewer servers, WLM significantly reduces
your administration and computer resource costs.
WLM provides you the ability to: