Sun Java System Application Server Enterprise Edition 8.2 Performance Tuning Guide


The Performance Tuning Guide describes how to get the maximum performance, scalability, and reliability from applications and Sun JavaTM System Application Server. This book is intended for use by server administrators, J2EE application developers, network administrators and evaluators.

This preface contains information about and conventions for the entire Sun Java System Application Server documentation set.

Application Server Documentation Set

The Application Server documentation set describes deployment planning and system installation. The Uniform Resource Locator (URL) for stand-alone Application Server documentation is The URL for Sun Java Enterprise System (Java ES) Application Server documentation is For an introduction to Application Server, refer to the books in the order in which they are listed in the following table.

Table P–1 Books in the Application Server Documentation Set

Book Title 


Release Notes

Late-breaking information about the software and the documentation. Includes a comprehensive, table-based summary of the supported hardware, operating system, Java Development Kit (JDKTM), and database drivers.

Quick Start Guide

How to get started with the Application Server product. 

Installation Guide

Installing the software and its components. 

Deployment Planning Guide

Evaluating your system needs and enterprise to ensure that you deploy the Application Server in a manner that best suits your site. General issues and concerns that you must be aware of when deploying the server are also discussed. 

Developer’s Guide

Creating and implementing Java 2 Platform, Enterprise Edition (J2EETM platform) applications intended to run on the Application Server that follow the open Java standards model for J2EE components and APIs. Includes information about developer tools, security, debugging, deployment, and creating lifecycle modules.

J2EE 1.4 Tutorial

Using J2EE 1.4 platform technologies and APIs to develop J2EE applications. 

Administration Guide

Configuring, managing, and deploying Application Server subsystems and components from the Administration Console. 

High Availability Administration Guide

Post-installation configuration and administration instructions for the high-availability database. 

Administration Reference

Editing the Application Server configuration file, domain.xml.

Upgrade and Migration Guide

Migrating your applications to the new Application Server programming model, specifically from Application Server 6.x and 7. This guide also describes differences between adjacent product releases and configuration options that can result in incompatibility with the product specifications. 

Performance Tuning Guide

Tuning the Application Server to improve performance. 

Troubleshooting Guide

Solving Application Server problems. 

Error Message Reference

Solving Application Server error messages. 

Reference Manual

Utility commands available with the Application Server; written in man page style. Includes the asadmin command line interface.

Related Documentation

Application Server can be purchased by itself or as a component of Java ES, a software infrastructure that supports enterprise applications distributed across a network or Internet environment. If you purchased Application Server as a component of Java ES, you should be familiar with the system documentation at The URL for all documentation about Java ES and its components is

For other Sun Java System server documentation, go to the following:

Additionally, the following resources might be useful:

Default Paths and File Names

The following table describes the default paths and file names that are used in this book.

Table P–2 Default Paths and File Names



Default Value 


Represents the base installation directory for Application Server. 

Sun Java Enterprise System (Java ES) installations on the SolarisTM platform:


Java ES installations on the Linux platform: 


Other Solaris and Linux installations, non-root user: 

user’s home directory/SUNWappserver

Other Solaris and Linux installations, root user: 


Windows, all installations: 



Represents the directory containing all domains. 

Java ES installations on the Solaris platform: 


Java ES installations on the Linux platform: 


All other installations: 



Represents the directory for a domain. 

In configuration files, you might see domain-dir represented as follows:




Represents the directory for a server instance. 


Typographic Conventions

The following table describes the typographic changes that are used in this book.

Table P–3 Typographic Conventions





The names of commands, files, and directories, and onscreen computer output 

Edit your .login file.

Use ls -a to list all files.

machine_name% you have mail.


What you type, contrasted with onscreen computer output 

machine_name% su



A placeholder to be replaced with a real name or value 

The command to remove a file is rm filename.


Book titles, new terms, and terms to be emphasized (note that some emphasized items appear bold online) 

Read Chapter 6 in the User's Guide.

A cache is a copy that is stored locally.

Do not save the file.

Symbol Conventions

The following table explains symbols that might be used in this book.

Table P–4 Symbol Conventions





[ ]

Contains optional arguments and command options. 

ls [-l]

The -l option is not required.

{ | }

Contains a set of choices for a required command option. 

-d {y|n}

The -d option requires that you use either the y argument or the n argument.

${ }

Indicates a variable reference. 


References the value of the com.sun.javaRoot variable.

Joins simultaneous multiple keystrokes. 


Press the Control key while you press the A key. 

Joins consecutive multiple keystrokes. 


Press the Control key, release it, and then press the subsequent keys. 


Indicates menu item selection in a graphical user interface. 

File -> New -> Templates 

From the File menu, choose New. From the New submenu, choose Templates. 

Documentation, Support, and Training

The Sun web site provides information about the following additional resources:

Searching Sun Product Documentation

Besides searching Sun product documentation from the docs.sun.comSM web site, you can use a search engine by typing the following syntax in the search field:


For example, to search for “broker,” type the following:


To include other Sun web sites in your search (for example,,, and, use in place of in the search field.

Third-Party Web Site References

Third-party URLs are referenced in this document and provide additional, related information.

Note –

Sun is not responsible for the availability of third-party web sites mentioned in this document. Sun does not endorse and is not responsible or liable for any content, advertising, products, or other materials that are available on or through such sites or resources. Sun will not be responsible or liable for any actual or alleged damage or loss caused or alleged to be caused by or in connection with use of or reliance on any such content, goods, or services that are available on or through such sites or resources.

Sun Welcomes Your Comments

Sun is interested in improving its documentation and welcomes your comments and suggestions. To share your comments, go to and click Send Comments. In the online form, provide the full document title and part number. The part number is a 7-digit or 9-digit number that can be found on the book's title page or in the document's URL. For example, the part number of this book is 819-4742.