Document revision date: 19 July 1999

Chapter 14
14	Managing System Parameters
14.1	Understanding System Parameters
14.1.1	Default, Current, and Active Values
14.1.2	Pages and Pagelets
14.2	Recommended Method for Changing Parameter Values
14.3	Converting Your Customized Parameter Settings for Use with AUTOGEN
14.4	Understanding the AUTOGEN Command Procedure
14.4.1	AUTOGEN Feedback
14.4.2	Feedback Report (AGEN$PARAMS.REPORT)
14.4.3	AUTOGEN Phases
14.4.4	AUTOGEN Parameter File (MODPARAMS.DAT)
14.5	Modifying System Parameters with AUTOGEN
14.5.1	Controlling AUTOGEN's Parameter Settings with MODPARAMS.DAT
14.5.1.1	Increasing a Value with the ADD_ Prefix
14.5.1.2	Specifying a Minimum Value with the MIN_ Prefix
14.5.1.3	Specifying a Maximum Value with the MAX_ Prefix
14.5.1.4	Specifying an Absolute Value
14.5.1.5	Defining the Number of VAXcluster Nodes (VAX Only)
14.5.1.6	Defining the Number of Ethernet Adapters (VAX Only)
14.5.1.7	Presetting Parameter Values Before Adding Memory (VAX Only)
14.5.1.8	Overriding Parameters Related to DECnet
14.5.1.9	Values Set for NPAGEDYN and NPAGEVIR
14.5.2	Specifying a Minimum Required Age for Feedback (VAX Only)
14.5.3	Including an External Parameter File in MODPARAMS.DAT
14.5.4	Turning Off Logging of DCL Statements
14.6	Automating AUTOGEN Reports
14.6.1	Changing Parameter Values After Reviewing AUTOGEN Reports
14.7	Managing System Parameters with SYSMAN
14.7.1	Understanding Parameter Values and SYSMAN
14.7.2	Showing Parameter Values with SYSMAN
14.7.3	Modifying a Parameter File with SYSMAN
14.7.4	Modifying Active Values with SYSMAN
14.8	Managing System Parameters with SYSGEN
14.8.1	Understanding Parameter Values and SYSGEN
14.8.2	Showing Parameter Values with SYSGEN
14.8.3	Modifying the System Parameter File with SYSGEN
14.8.4	Modifying Active Values with SYSGEN
14.8.5	Creating a New Parameter File with SYSGEN
14.9	Modifying System Parameters with a Conversational Boot
Chapter 15
15	Managing Page, Swap, and Dump Files
15.1	Understanding Dump Files
15.1.1	Using the Page File to Store System Crash Dumps
15.1.2	Understanding Types of System Dumps
15.2	Understanding Page and Swap Files
15.3	Displaying Information About Page and Swap Files
15.4	Manually Calculating Appropriate Sizes for Dump, Page, and Swap Files
15.4.1	Calculating System Dump File Size
15.4.2	Calculating Error Log Dump File Size
15.4.3	Calculating Page File Size
15.4.3.1	Representing Page File Size
15.4.3.2	Monitoring Page File Usage
15.4.3.3	Limiting Page File Space
15.4.4	Calculating Swap File Size
15.4.4.1	Representing Page File Size
15.4.4.2	Monitoring Swap File Usage
15.5	Minimizing System Dump File Size When Disk Space Is Insufficient
15.5.1	Understanding the Order of Information in a Selective System Dump
15.5.2	Fine-Tuning the Order That Processes Are Written in Selective System Dumps (Alpha Only)
15.6	Writing the System Dump File to an Alternate Disk
15.6.1	DOSD Requirements on Alpha Systems
15.6.2	DOSD Requirements on VAX Systems
15.7	Using SDA to Analyze the Contents of a Crash Dump
15.8	Using SDA CLUE Commands to Analyze Crash Dump Files (Alpha Only)
15.8.1	Understanding CLUE (Alpha Only)
15.8.2	Displaying Data Using SDA CLUE Commands (Alpha Only)
15.8.3	Using SDA CLUE with Dump Off System Disk (Alpha Only)
15.9	Using CLUE to Obtain Historical Information About Crash Dumps (VAX Only)
15.9.1	Understanding CLUE (VAX Only)
15.9.2	Displaying Data Using CLUE (VAX Only)
15.10	Saving the Contents of the System Dump File After a System Failure
15.11	Copying System Dump Files to Tape or Disk
15.12	Freeing Dump Information from the Page File
15.12.1	Freeing Dump Information on VAX and Alpha Systems
15.12.2	Usage Notes for Freeing Information on VAX and Alpha Systems
15.13	Installing Page and Swap Files
15.13.1	Installing Interactively
15.13.2	Installing in SYPAGSWPFILES.COM
15.14	Removing Page, Swap, and Dump Files
15.15	Creating and Modifying Page, Swap, and Dump Files
15.15.1	Using AUTOGEN (Recommended Method)
15.15.1.1	Controlling the Location of System Page, Swap, and Dump Files
15.15.1.2	Controlling the Size of System Page, Swap, and Dump Files in MODPARAMS.DAT
15.15.2	Using SWAPFILES.COM
15.15.3	Using SYSGEN

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