HP-UX System Administrator's Guide: Configuration Management

Table 10-3 Modify Kernel Module Fields (continued)
DescriptionField Name
Whether the module is a dynamically loadable kernel moduleDynamic
All the modules on which this module dependsDependencies
3. This window also displays the areas that you can change, as shown in Table 10-4.
The areas displayed depend on the capabilities of the module. Enter your changes.
Table 10-4 Modify Kernel Module Change Options
DescriptionField Name
Choose the new state for the module. Select one of auto, static, loaded,
or unused. The default is auto.
Next Boot State
Select either change immediately or change at next boot The default is
change at next boot.
Mode of Change
Check whether to back up the current configuration before applying the
change. By default, this check box is selected.
Backup
Enter comments about the change in the module stateReason for Change
4. (Optional) To see the command that will execute the changes, click the Preview
button.
5. After you have entered your changes, click the Modify button to execute them. Or
click the Cancel button to discard your changes.
Managing Kernel Tunable Parameters with kctune
The kctune command is used to query and change the values of kernel tunable
parameters (“tunables”), in the currently running configuration or in a saved
configuration. Tunables are variables that govern the behavior of the HP-UX kernel.
Tunables are used for a variety of different tasks: some control resource allocations;
others control security policies; others enable optional kernel behavior; etc. There are
150-200 tunables in a typical kernel. See the kctune(1M) manpage.
System administrators can create their own “user-defined” tunables if they choose.
These will not affect the operation of the system directly, but they can be used in
computing the values of other tunables. For example, an administrator could choose
to create a num_databases tunable, and then set several kernel tunables based on its
value. A subsequent change to the value of num_databases would cause all of the
related kernel tunable values to be changed as well.
170 Configuring the Kernel