Based on your examination of AGEN$PARAMS.REPORT, you might
need to modify parameter values in MODPARAMS.DAT. If so, note the
following:
In general, you should allow AUTOGEN
to calculate system parameters. You can hardcode values (such as
GBLPAGES=value), but doing so overrides AUTOGEN and might not allow
it to set an optimal value based on observed usage.
Whenever possible, use MIN_parameter values (such
as MIN_GBLPAGES) to set a minimum value. AUTOGEN will use this value
as a starting point and increase it if necessary. It will also adjust
related parameters, unless they are hardcoded, in which case information
will be provided in the AGEN$PARAMS.REPORT file. Use MAX_parameter
values to set a maximum value when it is necessary to limit a parameter
to a known maximum value.
Enter numeric values as integers,
without commas (for example, 10000). Enter alphabetic characters
in lower or uppercase.
HP recommends that you include
comments in the MODPARAMS.DAT file indicating who changed the value,
when it was done, and why it was done. An exclamation point serves
as a comment starter and can appear anywhere on a line. The following
is an example illustrating the modifications recommended in the
preceding bulleted items:
! the following changes made by K.Newcomb on 9/20/03
!
SWAPFILE=0 ! don't re-size the SWAPFILE on AUTOGEN runs
MIN_gblsections=750 ! required for DECwindows MOTIF
MIN_NPAGEDYN=2750000 ! set npagedyn to a min of 2.75 million
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 Installing the OpenVMS Alpha Operating System
