DIGITAL Enterprise Integration Packages
Installation Guide


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2.4 Modifying System Parameters

The following sections describe:

2.4.1 DECnet-Plus System Parameter Considerations

If you are using Phase IV names with DECnet-Plus, you must determine the values for SCSNODE, SCSSYSTEMID, and SYSMWCNT (see the PATHWORKStm Version 6 for OpenVMS (Advanced Server) Server Installation and Upgrade Guide). For example:


SCSNODE = same as DECnet node name for the server
SCSSYSTEMID = (1024x DECnet area number) + DECnet node number
SYSMWCNT = current value of SYSMWCNT + (number of GBLPAGES being added / 128) 

Round up SYSMWCNT to the nearest integer.

For example, if you are using GBLPAGES=78 000 to install PATHWORKS Version 6 for OpenVMS, add an additional 610 to SYSMWCNT.

2.4.2 OpenVMS Cluster System Parameters

If you are in an OpenVMS Cluster environment, SCSNODE and SCSSYSTEMID should already be appropriately set. If you must change SCSNODE to make it the same as the DECnettm node name, you must also create a new queue file and redefine the queues. See the OpenVMS system management documentation for instructions on this procedure.

2.4.3 Using MODPARAMS_EIS.DAT to Update System Parameters

The Enterprise Integration Packages provide the data file, MODPARAMS_EIS.DAT, that includes the minimum parameters necessary to install all the Enterprise Integration Packages components on OpenVMS Alpha. (Table 2-3 lists the parameter requirements for all the components.)

The MODPARAMS_EIS.DAT file enables you to optimize preinstallation tasks in the following ways:

To reset all your system parameters using MODPARAMS_EIS.DAT:

  1. Find MODPARAMS_EIS.DAT in the [DEIS020.DOCUMENTATION] directory; to locate the volume number of the CD where this directory resides, refer to your SPL master index.
  2. Append the MODPARAMS_EIS.DAT file to the end of SYS$SYSTEM:MODPARAMS.DAT.
  3. After combining the two files, delete the lines that contain the lower values if there are two values for the same MIN_parameter.
  4. Use AUTOGEN to tune the parameters based upon your system workload.
  5. Reboot the system.

You may need to increase the parameters specified in these files, depending on what other products are installed on your system.

2.4.4 Calculating the Values for Global Pages (GBLPAGES) and Global Sections (GBLSECTIONS)

To install and run the Enterprise Integration Packages, you must have sufficient free global pages (GBLPAGES) and global sections (GBLSECTIONS). Table 2-3 specifies the unused global sections and unused global pages your system needs for the installation to execute successfully.

To calculate how many unused global pages and global sections your system has:

  1. Run the Install utility (INSTALL) using the following command:


    $ INSTALL LIST /GLOBAL /SUMMARY
    

    The Install utility displays a summary of global pages and global sections used by your system, as well as the current number of unused global pages. For example:


    Summary of Memory Global Sections 
     
    258 Global Sections Used, 22580/3420 Global Pagelets Used/Unused
    

  2. Determine if the number of unused global pages (3420 in the example) is equal to or greater than what you need. If the number of unused pages is less than what you require, you need to increase the value for GBLPAGES.
  3. Note the amount shown for global sections used (258 in this example).
  4. Run the System Generation utility (SYSGEN) and use the SHOW command to determine how many global sections have been allocated. For example:


    $ RUN SYS$SYSTEM:SYSGEN
     
    SYSGEN> SHOW GBLSECTIONS
     
    Parameter Name Current Default Minimum Maximum  Unit   Dynamic 
    -------------- ------- ------- ------- -------  ----   ------- 
    GBLSECTIONS    512     250     20      4095   Sections
    

  5. Add the amount shown in the example summary in step 1 (258) to the value for GBLSECTIONS in Table 2-3. If the resulting value is greater than the value for currently available GBLSECTIONS as shown in step 4, you must increase the value of the GBLSECTIONS parameter.

Section 2.4.7 describes the procedures for increasing these values using AUTOGEN. See the OpenVMS System Management Utilities Reference Manuals or the OpenVMS System Manager's Manual for information on using AUTOGEN.

You can use the WRITE command with the F$GETSYI lexical function to find the number of contiguous free global pages and global sections. The following example shows how to get this information at your terminal (the default for SYS$OUTPUT):


$ WRITE SYS$OUTPUT F$GETSYI("CONTIG_GBLPAGES")
15848
$ WRITE SYS$OUTPUT F$GETSYI("FREE_GBLSECTS")
24

2.4.5 System Parameter Requirements

Table 2-3 lists the system parameters required if you install all of the components of the Enterprise Integration Packages. These system parameters are provided in the file MODPARAMS_EIS.DAT. See Section 2.4.7 to fine tune system parameters for the particular work load needs of your system.

Note

A system reboot is necessary to incorporate system parameter changes and should be done using AUTOGEN (see Section 2.4.7).

Table 2-3 System Parameter Requirements for R2.0
Parameter R2.0 Value R1.1 Value Notes
GBLPAGES 275000 1 240000 1  
GBLPAGFIL 3248 1 3248 1  
GBLSECTIONS 1525 1 1273 1  
MAXPROCESSCNT 50 32  
CLISYMTBL 512 512  
RESHASHTBL 2048 2048  
WSMAX 32768 32768  
CHANNELCNT 568 568 Or any number larger than the largest FILLM used on the system (whichever is larger).
MAXBUF 8192 8192 If Motif is loaded.
PROCSECTCNT 100 100  
SWPOUTPGCNT 512 512  
NPAGEDYN 1642000 1642000  
PAGEDYN 901120 901120  
NPAGEVIR 6496256 6496256  
KSTACKPAGES 2 2  
WINDOW_SYSTEM 1 1  
PQL_MASTLM 210 210  
PQL_DBIOLM 100 100  
PQL_MBIOLM 100 100  
PQL_MBYTLM 100000 100000  
PQL_MDIOLM 100 100  
PQL_MENQLM 350 350  
PQL_MFILLM 100 100  
PQL_MPGFLQUOTA 32768 32768  
PQL_MPRCLM 10 10  
PQL_MWSDEFAULT 1024 1024  
PQL_MWSEXTENT 8192 8192  
PQL_MWSQUOTA 2048 2048  
GH_RES_CODE 1024 1024  
GH_RSRVPGCNT 2000 2000  
IMGREG_PAGES 2000 2000  
SCSNODE -- -- See the discussion in Section 2.4.
SCSSYSTEMID -- -- See the discussion in Section 2.4.
SYSMWCNT -- -- See the discussion in Section 2.4.


1The values given are the number of free (unused) pages and sections that must be available before installation.

2.4.6 Checking System Parameter Values

To check the values of your system parameters:

  1. Enter the following command at the DCL prompt to invoke the System Generation (SYSGEN) utility:


    $ RUN SYS$SYSTEM:SYSGEN 
    

    The screen displays the SYSGEN> prompt.

  2. Enter the SHOW command and a system parameter name to display the value of that parameter.
    The values displayed should equal or exceed the value of each system parameter listed in Table 2-3 for the Enterprise Integration Packages package you are installing.
    For example, the following command displays the value for the WSMAX system parameter:


    SYSGEN> SHOW WSMAX
    

  3. After checking the parameters, enter EXIT at the SYSGEN> prompt to return to the DCL level.

2.4.7 Changing System Parameter Values with AUTOGEN

Use the AUTOGEN command procedure to change system parameters. AUTOGEN automatically adjusts values for parameters that are associated with the values you reset manually.

Each Enterprise Integration Packages component has its own system parameter requirements. If the components are treated separately, you will have to reboot, using AUTOGEN, for each component. See the individual component installation guides for detailed preinstallation information.

Note

You can avoid multiple reboots if you use MODPARAMS_EIS.DAT as described in Section 2.4.3.

To change system parameters with AUTOGEN:

  1. Edit the file SYS$SYSTEM:MODPARAMS.DAT using these guidelines:
  2. Exit from the editor and execute the AUTOGEN procedure to recalculate your system parameters. Reboot using the following command:


    $ @SYS$UPDATE:AUTOGEN GETDATA REBOOT
    

    Note

    When you specify REBOOT, AUTOGEN performs an automatic system shutdown and then reboots the system. Any users logged in to the system are immediately disconnected during the shutdown. The automatic reboot puts the new parameter values into effect.

    The AUTOGEN utility automatically adjusts some of the SYSGEN parameters based on the consumption of resources since the last reboot. If you do not want to take advantage of this automatic adjustment, include the NOFEEDBACK qualifier on the AUTOGEN command line.
    For more information about using AUTOGEN, refer to the OpenVMS System Manager's Manual: Essentials.


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