Recommended Method for Changing Parameter Values

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HP OpenVMS System Manager's Manual, Volume 2:...

Managing System Parameters

Understanding System Parameters

Converting Your Customized Parameter Settings for Use with AUTOGEN

Recommended Method for Changing Parameter Values

Many system parameters can affect other parameters and the performance of the system. For this reason, HP recommends that you use the command procedure SYS$UPDATE:AUTOGEN.COM (AUTOGEN) to manage system parameters. For information about AUTOGEN, see Understanding the AUTOGEN Command Procedure.

The System Management utility (SYSMAN) and the System Generation utility (SYSGEN) also allow you to manage system parameters. Although these utilities are not generally recommended for changing parameter values, you can use one of these utilities for the following reasons:

To display system parameters and their values on a VAX or Alpha system

To display system parameters and their values for systems in an OpenVMS Cluster environment

To temporarily modify a single parameter that has little effect on other parameters

If you change a parameter value with SYSMAN or SYSGEN, the value you set will be overridden or reset to the default value when you run AUTOGEN. To retain the changes when you run AUTOGEN, you must add the parameter value to the AUTOGEN parameter file MODPARAMS.DAT. For more information, see Controlling AUTOGEN's Parameter Settings with MODPARAMS.DAT.

If you currently use SYSMAN or SYSGEN to change parameters, and you have not added your customized parameter settings to MODPARAMS.DAT, follow the instructions in Converting Your Customized Parameter Settings for Use with AUTOGEN before running AUTOGEN.

Understanding System Parameters

Converting Your Customized Parameter Settings for Use with AUTOGEN