After you install Access Manager, you can tune your deployment for optimum performance using the Access Manager tuning scripts. These scripts allow you to tune Access Manager, the SolarisTM Operating System (OS), the web container, and Directory Server.
The Java Enterprise System installer installs the Access Manager tuning scripts and related files in the following directory, depending on your platform:
Solaris systems: AccessManager-base/SUNWam/bin/amtune
Linux systems: AccessManager-base/identity/bin/amtune
AccessManager-base represents the Access Manager base installation directory. The default base installation directory depends on your platform:
Solaris systems: /opt
Linux systems: /opt/sun
The amtune script is a top-level script that calls other tuning scripts as needed. This script is not interactive; before you run amtune, you edit parameters in the amtune-env configuration file to specify the tuning you want to perform for your specific environment. The amtune-env configuration file includes two major sections:
Performance related parameters that you set to control the tuning
An internal section that is maintained by Access Manager engineering and should not be modified
You can run the amtune script in two modes:
Review mode: amtune reports tuning recommendations but does not make any actual changes to your environment.
Change mode: amtune makes actual changes, except for Directory Server, depending on parameters in the amtune-env configuration file.
The amtune script does not automatically tune Directory Server. Most deployments have applications other than Access Manager that also access Directory Server, so you don’t want to make tuning changes without considering how they would affect the other applications.
Before you tune Directory Server, first back up your Directory Server data.
When you run amtune, the script creates a tar file that contains the Directory Server tuning script, amtune-directory. Untar this file in a temporary directory and then run the script in review mode. When you are certain that your changes are acceptable for all applications at your deployment, run amtune-directory in change mode.
For detailed information about running the tuning scripts and setting tuning parameters in the amtune-env configuration file, see the Sun Java System Access Manager 7.1 Performance Tuning and Troubleshooting Guide.