HP OpenVMS systems documentation

Displays the value of a parameter or a group of parameters in the work area. In addition, the command shows the minimum, maximum, and default values of a parameter and its unit of measure.

Format

PARAMETERS SHOW [parameter-name]

Parameter

parameter-name

Specifies the name of a parameter or a period (.). A period is interpreted as a request for the parameter specified in the last PARAMETERS SET or PARAMETERS SHOW command. The parameter name can be abbreviated, but the abbreviation must be unique because SYSMAN selects the first parameter that matches.

Beginning in OpenVMS Version 8.2, if the parameter-name that you enter is obsolete, SYSMAN displays OBSOLETE in the Units column.

Qualifiers

/ACP

Displays all Files--11 ACP parameters.

/ALL

Displays the values of all active parameters.

/CLUSTER

Displays all parameters specific to clusters.

/DYNAMIC

Displays all parameters that would be in effect immediately after you enter a PARAMETERS WRITE ACTIVE command.

/GEN

Displays all general parameters.

/HEX

Displays numeric parameters in hexadecimal rather than decimal radix. Specify the /HEX system parameter name or the parameter type. If you specify the /HEX qualifier with the /NAMES qualifier, /HEX is ignored.

/JOB

Displays all job controller parameters.

/LGI

Displays all LOGIN security control parameters.

/MAJOR

Displays the most important parameters.

/MULTIPROCESSING

Displays parameters specific to multiprocessing.

/NAMES

Displays only parameter names. You can combine other qualifiers with this one.

/OBSOLETE

Displays the names of all obsolete system parameters.

/OUTPUT

Directs output to the specified file rather than SYS$OUTPUT. Without a file specification, the output goes to SYSMAN.LIS in the current directory.

/PAUSE

Controls the rate at which the system displays information about parameters.

/PQL

Displays the parameters for all default process quotas.

/RMS

Displays all parameters specific to OpenVMS Record Management Services (RMS).

/SCS

Displays all parameters specific to OpenVMS Cluster System Communications Services.

/SPECIAL

Displays all special control parameters.

/STARTUP

Displays the name of the site-independent startup procedure.

/SYS

Displays all active system parameters.

/TTY

Displays all parameters for terminal drivers.

Description

SYSMAN displays parameters in decimal unless you specify the /HEX qualifier. ASCII values are always displayed in ASCII.

Abbreviations for parameter names must be unique because SYSMAN displays the first parameter matching the abbreviation. Ambiguity checks do not occur. For example, a specification of PARAMETERS SHOW GBL displays the GBLSECTIONS parameter. To display the GBLPAGFIL parameter, you must specify PARAMETERS SHOW GBLPAGF to avoid displaying the GBLPAGES parameter.

You can use a period (.) to indicate that you want to work with the system parameter that you specified in the last PARAMETERS SET or PARAMETERS SHOW command.

Examples

SYSMAN> PARAMETERS SHOW GBLSECTIONS
Parameter Name    Current   Default   Minimum     Maximum Unit  Dynamic
GBLSECTIONS           100        40        20     -1  Sections
 
SYSMAN> PARAMETERS SET . 110
SYSMAN> PARAMETERS SHOW .
Parameter Name    Current   Default   Minimum     Maximum Unit  Dynamic
GBLSECTIONS           110        40        20     -1  Sections          
      

In this example, the user first displays the values of the GBLSECTIONS parameter and then refers to the parameter with a period to set its current value to 110. The next PARAMETERS SHOW command also uses the period notation to obtain confirmation that the change occurred.

SYSMAN> PARAMETERS SHOW/ACP
      

This command produces output similar to the following example:

Parameters in use: Active Parameter Name Current Default Minimum Maximum Unit Dynamic ACP_MULTIPLE 0 1 0 1 Boolean D ACP_SHARE 1 1 0 1 Boolean ACP_MAPCACHE 52 8 1 -1 Pages D ACP_HDRCACHE 138 128 2 -1 Pages D ACP_DIRCACHE 138 80 2 -1 Pages D ACP_DINDXCACHE 37 25 2 -1 Pages D ACP_WORKSET 0 0 0 -1 Pages D ACP_FIDCACHE 64 64 0 -1 File-Ids D ACP_EXTCACHE 64 64 0 -1 Extents D ACP_EXTLIMIT 300 300 0 1000 Percent/10 D ACP_QUOCACHE 130 64 0 -1 Users D ACP_SYSACC 4 8 0 -1 Directories D ACP_MAXREAD 32 32 1 64 Blocks D ACP_WINDOW 7 7 1 -1 Pointers D ACP_WRITEBACK 1 1 0 1 Boolean D ACP_DATACHECK 2 2 0 3 Bit-mask D ACP_BASEPRIO 8 8 4 31 Priority D ACP_SWAPFLGS 14 15 0 15 Bit-mask D ACP_XQP_RES 1 1 0 1 Boolean ACP_REBLDSYS 0 1 0 1 Boolean

SYSMAN> PARAMETERS SHOW/ACP/HEX
      

This command produces a hexadecimal display of the values of the ACP system parameters.

Parameters in use: Active Parameter Name Current Default Minimum Maximum Unit Dynamic ACP_MULTIPLE 00000000 00000001 00000000 00000001 Boolean D ACP_SHARE 00000001 00000001 00000000 00000001 Boolean ACP_MAPCACHE 00000034 00000008 00000001 FFFFFFFF Pages D ACP_HDRCACHE 0000008A 00000080 00000002 FFFFFFFF Pages D ACP_DIRCACHE 0000008A 00000050 00000002 FFFFFFFF Pages D ACP_DNDXCACHE 00000025 00000019 00000002 FFFFFFFF Pages D ACP_WORKSET 00000000 00000000 00000000 FFFFFFFF Pages D ACP_FIDCACHE 00000040 00000040 00000000 FFFFFFFF File-Ids D ACP_EXTCACHE 00000040 00000040 00000000 FFFFFFFF Extents D ACP_EXTLIMIT 0000012C 0000012C 00000000 000003E8 Percent/10 D ACP_QUOCACHE 00000082 00000040 00000000 FFFFFFFF Users D ACP_SYSACC 00000004 00000008 00000000 FFFFFFFF Directories D ACP_MAXREAD 00000020 00000020 00000001 00000040 Blocks D ACP_WINDOW 00000007 00000007 00000001 FFFFFFFF Pointers D ACP_WRITEBACK 00000001 00000001 00000000 00000001 Boolean D ACP_DATACHECK 00000002 00000002 00000000 00000003 Bit-mask D ACP_BASEPRIO 00000008 00000008 00000004 0000001F Priority D ACP_SWAPFLGS 0000000E 0000000F 00000000 0000000F Bit-mask D ACP_XQP_RES 00000001 00000001 00000000 00000001 Boolean ACP_REBLDSYS 00000000 00000001 00000000 00000001 Boolean

SYSMAN> PARAMETERS SHOW/OBSOLETE
      

This command displays the names of all obsolete system parameters.

SYSMAN> PARAMETERS SHOW/OBSOLETE

Node XENON3: Parameters in use: ACTIVE Parameter Name Current Default Minimum Maximum Unit Dynamic -------------- ------- ------- ------- ------- ---- ------- VECTOR_PROC 1 1 0 3 Obsolete PAGFILCNT 0 0 0 0 Obsolete SWPFILCNT 0 0 0 0 Obsolete VIRTUALPAGECNT 2147483647 2147483647 2048 2147483647 Obsolete EXUSRSTK 1024 1024 1024 -1 Obsolete QBUS_MULT_INTR 0 0 0 1 Obsolete LAMAPREGS 0 0 0 255 Obsolete LOCKIDTBL_MAX 4251127 16776959 1792 16776959 Obsolete SCSCONNCNT 40 40 2 32767 Obsolete UDABURSTRATE 0 0 0 31 Obsolete SA_APP 0 0 0 1 Obsolete TAILORED 0 0 0 1 Obsolete BOOT_STYLE 0 0 0 2 Obsolete SD_ALLOCLASS 0 0 0 255 Obsolete NISCS_LAN_OVRHD 0 0 0 256 Obsolete SERVED_IO 0 0 0 0 Obsolete XFMAXRATE 236 236 0 255 Obsolete . . .

SYSMAN> PARAMETERS SHOW <parameter_name>
      

This command displays information about one obsolete system parameter, VIRTUALPAGECNT.

SYSMAN> PARAMETERS SHOW VIRT

%SYSMAN-I-NODERR, error returned from node XENON3 -SMI-E-NOSUCHPARM, no such parameter

You must enter the full name of the parameter:

SYSMAN> PARAMETERS SHOW VIRTUALPAGECNT

Node XENON3: Parameters in use: ACTIVE Parameter Name Current Default Minimum Maximum Unit Dynamic -------------- ------- ------- ------- ------- ---- ------- VIRTUALPAGECNT 2147483647 2147483647 2048 2147483647 Obsolete SYSMAN> $

SYSMAN> PARAMETERS SHOW/STARTUP
Startup command file = SYS$SYSTEM:STARTUP.COM
      

This command displays the name of the site-independent startup command procedure.

SYSMAN> PARAMETERS SHOW/PAUSE MAXPROCESSCNT

Node EXPERT: Parameters in use: ACTIVE Parameter Name Current Default Minimum Maximum Unit Dynamic -------------- ------- ------- ------- ------- ---- ------- MAXPROCESSCNT 160 32 12 8192 Processes

Press return to continue [Return]

Node MODERN: Parameters in use: ACTIVE Parameter Name Current Default Minimum Maximum Unit Dynamic -------------- ------- ------- ------- ------- ---- ------- MAXPROCESSCNT 157 32 12 8192 Processes

Press return to continue [Return]

Node IMPOSE: Parameters in use: ACTIVE Parameter Name Current Default Minimum Maximum Unit Dynamic -------------- ------- ------- ------- ------- ---- ------- MAXPROCESSCNT 50 32 12 8192 Processes

Press return to continue [Return]

.
.
.

The command in this example allows you to control the rate at which the information is displayed.

PARAMETERS USE

Reads a set of system parameters into the work area for display or modification.

Format

PARAMETERS USE source

Parameter

source

The source of a system parameter file for data to be read into the work area. The source can be any of the following items:

Qualifiers

None.

Description

Depending on the source you enter with the command, PARAMETERS USE activates the parameter values:

• Stored in memory (ACTIVE)
• Stored in the default boot parameter file (CURRENT)
• From another file (filespec)
• From the system default values (DEFAULT)

Example

SYSMAN> PARAMETERS USE DEFAULT
SYSMAN> SET STARTUP_P1 "MIN"
 
      

The first command activates the default parameter values that are supplied with the operating system. The second command sets the STARTUP_P1 system parameter to "minimum." This avoids starting all layered products on a system that is not tuned for them, which might cause the system to hang.

PARAMETERS WRITE

Writes the contents of the work area to memory, to disk, or to a file, depending on the destination that you specify.

Format

PARAMETERS WRITE destination

Parameter

destination

The destination of a new parameter file can be any of the following ones:

Qualifiers

None.

Description

The PARAMETERS WRITE command writes the system parameter values and the name of the site-independent startup command procedure from the work area to the active system in memory, the current system parameter file on disk, or your choice of a parameter file. You can write only dynamic parameter values to the active system.

Both the PARAMETERS WRITE ACTIVE and PARAMETERS WRITE CURRENT commands send a message to OPCOM to record the event.

Examples

SYSMAN> PARAMETERS WRITE SYS$SYSTEM:SPECIAL
      

This command creates a new parameter specification file.

SYSMAN> PARAMETERS WRITE CURRENT
      

This command modifies the current system parameter file on disk (SYS$SYSTEM:ALPHAVMSSYS.PAR).

RESERVED_MEMORY ADD (Alpha and I64)

On Alpha and I64 systems, adds an entry to the Reserved Memory Registry data file. Changes and additions to the Reserved Memory Registry data file do not take effect until the next reboot of the system.

Use the RESERVED_MEMORY ADD command to reserve an amount of physical memory that might be needed at a future time. Use the /ALLOCATE qualifier to set aside one or more blocks of physical memory during the boot process. Using the /ALLOCATE qualifier allows memory to be sufficiently contiguous and aligned to be used with granularity hints.

AUTOGEN processes the Reserved Memory Registry data file in its GETDATA phase. AUTOGEN takes the size of all entries into account when calculating system parameters that depend on the available amount of physical memory.

AUTOGEN uses the reservation size of all entries to calculate the initial size of the global page table unless the entry was specified as /NOGLOBAL_SECTION.

For more information about the Reserved Memory Registry, refer to the HP OpenVMS System Manager's Manual and the HP OpenVMS Programming Concepts Manual.

Format

RESERVED_MEMORY ADD name

Parameter

name

Name of the memory reservation. You must specify a name.

If the reservation is for a memory resident global section, the name of the reservation must be the same as the global section name.

Qualifiers

/ALLOCATE

/NOALLOCATE (default)

Allocates pages during the next reboot of the system. The physical alignment of the pages is based on the maximum granularity hint factor that can be used to map the pages without exceeding the size of the memory reservation. (See the introduction to this section for more information about the /ALLOCATE qualifier.)

Possible granularity hint factors are 512 pages (or 4 MB) and 64 pages (or 512 KB). Therefore, assuming an 8 KB system page size, reserved memory is physically aligned as follows:

• size >= 4 MB: physically aligned on a 4 MB boundary
• size < 4 MB: physically aligned on a 512 KB boundary

If you specify /NOALLOCATE, or do not specify /ALLOCATE, memory is reserved only by reducing the system's fluid page count, but no specific pages are set aside.

/GLOBAL_SECTION (default)

/NOGLOBAL_SECTION

/NOGLOBAL_SECTION indicates that the memory qualifier is for a privileged application instead of a group or system global section. (/GLOBAL_SECTION indicates that the memory qualifier is for a group or system global section.) You cannot use /NOGLOBAL_SECTION with the qualifiers /GROUP, /SYSGBL, or /PAGE_TABLES.

/GROUP=n

Establishes that the reserved memory is for a group global section. The value n specifies the UIC group number (in octal) of the process that creates the group global section. Only processes within the creator's UIC group number are allowed access to the global section. For example, if a process with the UIC of [6,100] is the creator of the group global section, the group number for the /GROUP qualifier is 6.

You cannot use the /GROUP qualifier with either /SYSGBL or /NOGLOBAL_SECTION qualifiers.

/PAGE_TABLES (default)

/NOPAGE_TABLES

Reserves additional memory for shared page tables. When the memory-resident global section is created, shared page tables are created for the global section. If you do not specify /ALLOCATE (or if you specify /NOALLOCATE), the additional reserved memory is deducted only from the system's fluid page count. If you specify /ALLOCATE, additional pages are allocated for the shared page table during the next reboot of the system, and the additional reserved memory is deducted from the system's fluid page count.

If you do not specify /PAGE_TABLES, or if you specify /NOPAGE_TABLES, additional memory is not reserved for shared page tables. When the memory-resident global section is created, shared page tables are not created for the global section.

/RAD=n

Specifies the preferred resource affinity domain (RAD) for the reservation you want to make. The value of n is the number of the RAD you specify. If you omit this qualifier, or if this RAD does not have sufficient memory, any other RAD can satisfy the reservation request, and the first available memory section will be used.

The /ALLOCATE qualifier is enforced implicitly when you specify a RAD.

Refer to Section 21.4 for an example procedure that shows how to use SYSMAN RAD qualifiers and options.

/SIZE=size of reserved memory, in MBs

Specifies the number of megabytes to be deducted from the system's fluid page count for this memory-resident global section when the VMS$RESERVED_MEMORY.DATA data file is read during system initialization.

/SYSGBL

Indicates that a reservation is for a system global memory-resident section.

You cannot combine this qualifier with the /GROUP or /NOGLOBAL_SECTION qualifier. This qualifier is the default unless you specify /GROUP or /NOGLOBAL_SECTION.

/ZERO

/NOZERO (default)

/ZERO implies /ALLOCATE. If you specify /ZERO, preallocated pages are zeroed during system initialization. Zeroed pages are required for memory-resident global sections; however, the pages do not need to be zeroed during system initialization.

/NOALLOCATE implies /NOZERO because /ZERO is incompatible with /NOALLOCATE. If you do not specify /ZERO, or if you specify /NOZERO, preallocated pages are not zeroed during system initialization. Instead, these pages are zeroed when the global section is created.

Description

The OpenVMS operating system allows you to reserve non-fluid memory for use within a memory-resident global demand-zero section. The reserved memory can be simply a deduction from the system's fluid memory size, or it can be preallocated as physical pages.

Using the Reserved Memory Registry ensures that AUTOGEN tunes the system properly not to include memory-resident section pages in its calculation of the system's fluid page count. AUTOGEN sizes the system page file, the number of process, and the working set maximum size based on the system's fluid page count. A system can experience severe performance problems if AUTOGEN adjusts parameters based on a fluid page count that does not account for the physical memory that is permanently reserved for some other purpose.

Using the Reserved Memory Registry also ensures that memory is available for memory-resident sections when the allocate option is used.

Users of reserved, non-fluid memory enter the characteristics of the memory into a data file that is read during the system initialization (boot-time). The file is called SYS$SYSTEM:VMS$RESERVED_MEMORY.DATA, and you use the SYSMAN utility to maintain it.

Note Do not edit the SYS$SYSTEM:VMS$RESERVED_MEMORY.DATA data file.

VMS$RESERVED_MEMORY.DATA is read during system initialization. For each entry in this data file, the number of megabytes is deducted from the system's fluid page count for this memory-resident global section as specified by the /SIZE qualifier on the RESERVED_MEMORY ADD command. If /PAGE_TABLES was specified, the amount of memory required for the shared page tables mapping the memory-resident global section is deducted from the system's fluid page count as well.

The following table summarizes the effects of qualifiers on the RESERVED_MEMORY ADD command:

Qualifier	Effect
/ALLOCATE	A block of physical pages is also allocated and set aside for the memory-resident global section.
/PAGE_TABLES	An additional block of physical pages is allocated and set aside for the shared page tables. The pages have a physical alignment appropriate to use the largest granularity hint factor for the block.
/ZERO	The pages are zeroed during system initialization or when the system is idle.
/NOZERO	The pages are zeroed when the memory-resident global section is created.

If you set the system parameter STARTUP_P1 to "MIN", entries in the Reserved Memory Registry are ignored, and memory is not reserved.

During system initialization while processing the Reserved Memory Registry data file, if the system encounters errors reserving fluid pages or allocating physical pages, it issues a warning to the console, and the system continues to boot; the request, however, is not granted.

Example

SYSMAN> RESERVED_MEMORY ADD DFW$GS_1 /NOPAGE /GROUP=100 /SIZE=1
SYSMAN> RESERVED_MEMORY ADD DFW$GS_2 /PAGE /SIZE=2 /ALLOC /ZERO
SYSMAN> RESERVED_MEMORY ADD DFW$GS_3 /PAGE /SIZE=3
      

The commands in this example add entries to the Reserved Memory Registry data file. (The example for the RESERVED_MEMORY SHOW command displays the values for these entries.)