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General
Notes About Modifying System Parameters
In modifying system parameters, note the following:
value
), but doing so overrides AUTOGEN and might not allow
it to set an optimal value based on observed usage. ! 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, refer torefer to the HP OpenVMS System Manager's Manual, Volume 2: Tuning, Monitoring, and Complex Systems.
Modifying
System Parameters After an Upgrade
Review the file SYS$SYSTEM:MODPARAMS.DAT. The upgrade procedure
created a new version of this file. The old version is named SYS$SYSTEM:MODPARAMS.DAT_OLD.
The new MODPARAMS.DAT file contains all the parameters in the old
file, plus various parameters that the upgrade procedure added to ensure
that all necessary system parameters are properly propagated from
the earlier version of OpenVMS. The upgrade procedure also adds
comment lines to explain the source of the parameters in each section
of the new MODPARAMS.DAT file.
Note that the old MODPARAMS.DAT is included in the new MODPARAMS.DAT each time an upgrade is performed. Because of this, if MODPARAMS.DAT is not reviewed and cleaned up after each upgrade, it might eventually contain many levels of duplicated parameters. For this reason, you should review MODPARAMS.DAT after each upgrade. This allows you to eliminate any duplication. You can also take this opportunity to modify any parameters, if necessary.
Based on your examination of AGEN$PARAMS.REPORT, you might need to modify parameter values in MODPARAMS.DAT.
The following subsections are examples of instances where you need to modify parameters in MODPARAMS.DAT.
System File Sizes
AUTOGEN sets the following files at sizes appropriate for
your system:
If you have special work loads or configurations, you can specify different sizes for these files by performing the following steps:
$
@SYS$UPDATE:AUTOGEN SAVPARAMS TESTFILES
$
@SYS$UPDATE:AUTOGEN GENPARAMS SETPARAMS
OpenVMS Cluster Parameters
If you are upgrading an OpenVMS Cluster system, note the following:
x
.SYSEXE]MODPARAMS.DAT, where x represents
the root number; for example, SYS0, SYS1, SYS2, and so forth. (Valid
root numbers may include hexadecimal digits -- SYSA, SYSB, and so
forth.)
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