HP OpenVMS 8.x manual Ensuring You Have a Recent FEEDBACK.DAT File

IMPORTANT: Any system parameters that you modified and did not enter in the

SYS$SYSTEM:MODPARAMS.DAT file are lost during the upgrade. To retain these parameters, enter their names and the values that you have in use for them in SYS$SYSTEM:MODPARAMS.DAT. When AUTOGEN runs after the upgrade, it uses the values in SYS$SYSTEM:MODPARAMS.DAT.

For example, if the current value of GBLPAGES is 30000, and you modified GBLPAGES by 128 pages above the default, add the following line to SYS$SYSTEM:MODPARAMS.DAT:

MIN_GBLPAGES=30128 !Increased by 128 by PLM for product z 12/12/04

AUTOGEN compares the computed value of GBLPAGES with this MIN_ value (30128). If the computed value is less than the specified MIN_ value, AUTOGEN increases the value of GBLPAGES to the MIN_ value. Each time AUTOGEN runs, it makes the same comparison and adjusts the value of GBLPAGES, but never below the minimum indicated by MIN_GBLPAGES.

IMPORTANT: If you modify system parameters, 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 the minimum value that can be set for a parameter by AUTOGEN. AUTOGEN increases the value if necessary. It also adjusts related parameters, unless they are hardcoded, in which case information is provided in the AGEN$PARAMS.REPORT file. Use MAX_parameter values to set a maximum value when you need to limit a parameter to a known maximum value.

•Enter numeric values as integers, without commas (for example, 10000). Enter alphabetic characters in lowercase 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 using AUTOGEN as recommended, see Section 7.22 (page 144).

If your system was upgraded previously, a new SYS$SYSTEM:MODPARAMS.DAT file was created then. This file has comments and possibly duplicated entries that were created during that upgrade. If you upgrade again, SYS$SYSTEM:MODPARAMS.DAT can become unnecessarily large and potentially confusing. HP recommends that you edit and reorganize SYS$SYSTEM:MODPARAMS.DAT before you upgrade again.

NOTE: On a cluster system disk, the MODPARAMS.DAT file should exist in

SYS$SYSROOT:[SYSEXE] for each root. You must edit MODPARAMS.DAT as necessary for each root.

4.6 Ensuring You Have a Recent FEEDBACK.DAT File

Before upgrading your system, HP recommends that you have a recent AGEN$FEEDBACK.DAT file. This file is in SYS$SPECIFIC:[SYSEXE] (that is, in [SYSx.SYSEXE], where x is the root; for example, SYS0 or SYS1). In OpenVMS Cluster systems, this file should exist in each node’s

4.6 Ensuring You Have a Recent FEEDBACK.DAT File 83