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Chapter 4.
Performance tuning and
configuration
To optimize performance, it is necessary to configure a system differently than the default
settings. This chapter lists several areas to consider during system tuning, including Business
Process Manager products and other products in the system, such as DB2. Documentation
for each of these products can answer questions about performance, capacity planning, and
configuration and offers guidance about achieving high performance in various operational
environments.
Several configuration parameters are available to the system administrator. Although this
chapter identifies several specific parameters observed to affect performance, it does not
address all available parameters. For a complete list of configuration parameters and possible
settings, see the relevant product documentation.
The first section of this chapter offers a methodology for tuning a deployed system. Following
this section is a basic tuning checklist that enumerates the major components and their
associated tuning parameters. Subsections follow the checklist that address tuning in more
detail, describing several tuning parameters and their suggested settings (where appropriate)
and providing advanced tuning guidelines for key areas of the system. Representative values
for many tuning parameters are shown in Chapter 5, “Initial configuration settings” on
page 97.
Important: There is no guarantee that following the guidance in this chapter will provide
acceptable performance for your application. However, if you set these parameters
incorrectly, you can expect degraded performance.
“Related publications” on page 107 contains references to related documentation that might
prove valuable when tuning a particular configuration.
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