Although AUTOGEN runs automatically at the end of the upgrade
procedure, HP recommends that you run AUTOGEN periodically after
you perform an upgrade. In addition, run AUTOGEN immediately after
you make hardware changes, such as installations or changes to memory,
the CPU, and adapter and network cards, or changes made to the Galaxy
configuration. Following this advice is a critical first step toward helping
enhance system performance and uptime. Each time you run AUTOGEN,
be sure to reboot your system so that usage-based changes can be
incorporated into the system's parameters file.
If you have feedback for your system, HP recommends that you
run AUTOGEN weekly through the SAVPARAMS and TESTFILES phases. Examine
AGEN$PARAMS.REPORT to determine the need for additional changes.
AUTOGEN sets the values of system parameters and the sizes of the
page and swap files according to the system's work load. If the
reports recommend a significant change, then run AUTOGEN through
the SETPARAMS and REBOOT phases. (For information about the importance
of having a current AGEN$FEEDBACK.DAT file, and a cautionary note
about running AUTOGEN, see
Ensuring You Have a Recent FEEDBACK.DAT File.)
Hardcoded values in MODPARAMS.DAT should not hinder AUTOGEN's
ability to calculate feedback parameters. AUTOGEN generally does
not reduce the value of parameters that allocate resources; it considers
current parameter values to be minimum values, which means you do
not have to add MIN_* symbols to MODPARAMS.DAT. AUTOGEN does increase
parameter values according to its calculations unless you have specified
explicit or maximum values (by adding MAX_* symbols) in MODPARAMS.DAT.
For more information about the MODPARAMS.DAT file and about
using AUTOGEN in general, see the chapter entitled "Managing
System Parameters" in the HP OpenVMS System Manager's Manual, Volume 2: Tuning, Monitoring, and Complex Systems.
HP OpenVMS Alpha Version 7.3-2 Upgrade and Installation... 
After Upgrading the OpenVMS Alpha Operating System
