There are several PARAMETERS subcommands. Select the one you want
from the choices below.
1 – DISABLE
1.1 – CHECKS
Bypasses validation of parameter values. SYSMAN parameter
validation ensures that the parameters fall within the defined
minimum and maximum values specified in the PARAMETERS SET
command.
Format
PARAMETERS DISABLE CHECKS
1.1.1 – Description
The PARAMETERS DISABLE CHECKS command enables you to override
minimum and maximum values established for system parameters.
SYSMAN does parameter checks by default. If you attempt to
set parameter values outside the allowable limits when checks
are enabled, the operating system issues an error message. By
disabling checks you can set parameter values regardless of the
minimum and maximum limits.
NOTE
Range checks are enabled by default because VSI suggests that
systems operate within these minimum and maximum values.
Setting parameters outside these limits can result in system
failures or hangs.
1.1.2 – Example
SYSMAN> SET ENVIRONMENT/CLUSTER
SYSMAN> SET PROFILE/DEFAULT=SYS$SYSTEM/PRIVILEGES=CMEXEC
SYSMAN> PARAMETERS SET MAXPROCESSCNT 10
%SMI-E-OUTRANGE, parameter is out of range
SYSMAN> PARAMETERS DISABLE CHECKS
SYSMAN> PARAMETERS SET MAXPROCESSCNT 10
In this example, the initial attempt to set MAXPROCESSCNT
below the minimum fails because range checks are enabled.
However, once range checks are disabled, the PARAMETERS SET
MAXPROCESSCNT command succeeds.
2 – ENABLE
2.1 – CHECKS
Validates all parameter values to ensure that they fall within
the defined minimum and maximum values.
Because range checks are enabled by default, use PARAMETERS
ENABLE CHECKS after entering a PARAMETERS DISABLE CHECKS command.
Format
PARAMETERS ENABLE CHECKS
2.1.1 – Example
SYSMAN> PARAMETERS DISABLE CHECKS
SYSMAN> PARAMETERS SET WSMAX 20
SYSMAN> PARAMETERS ENABLE CHECKS
SYSMAN> PARAMETERS SET WSMAX 30
%SMI-E-OUTRANGE, parameter is out of range
SYSMAN> PARAMETERS SHOW WSMAX
Parameter Name Current Default Minimum Maximum Unit Dynamic
WSMAX 2000 1024 60 6400 pages
The PARAMETERS ENABLE CHECKS command in this example shows
that when range checking is disabled, the system accepts a
working set value (WSMAX) of 20. However, once range checking
is enabled with the PARAMETERS ENABLE CHECKS command, the
system does not accept a WSMAX below the minimum, which is
60.
3 – SET
Changes the value of a specific parameter in the work area.
The PARAMETERS SET command does not modify parameter files, the
current system parameter file on disk, or the active system.
For information about performing these modifications, see the
PARAMETERS WRITE command.
Format
PARAMETERS SET parameter-name [value]
/STARTUP filespec
3.1 – Parameters
parameter-name
Specifies the name of the parameter to modify. Instead of a
name, you can enter a period (.) to change the value of the most
recently displayed or the most recently modified parameter. See
the PARAMETERS SHOW command for an example of using the period in
place of a parameter name.
For a list of system parameters and further information about
them, use the command HELP PARAMETERS.
value
Specifies the new value for the parameter. Enclose values for
ASCII parameters in quotation marks if they contain embedded
spaces or other special characters.
Typically the value is an integer or the keyword DEFAULT. The
keyword DEFAULT sets the parameter to its default value. The
PARAMETERS SHOW command displays the defined minimum, maximum,
and default values for the parameter, which are required unless
range checking is disabled with the command PARAMETERS DISABLE
CHECKS.
3.2 – Qualifier
3.2.1 /STARTUP
/STARTUP filespec
Sets the name of the site-independent startup procedure to the
given file specification. A file specification has a maximum
length of 31 characters. The initial startup command procedure is
SYS$SYSTEM:STARTUP.COM.
3.3 – Examples
1.SYSMAN> PARAMETERS SET PFCDEFAULT 20
This command assigns a value of 20 to the PFCDEFAULT parameter.
2.SYSMAN> PARAMETERS SET GBLSECTIONS DEFAULT
This command assigns the default value (40) to the GBLSECTIONS
parameter.
3.SYSMAN> PARAMETERS SET/STARTUP SYS$SYSTEM:XSTARTUP.COM
This command assigns SYS$SYSTEM:XSTARTUP.COM as the current
site-independent startup command procedure.
4 – SHOW
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]
4.1 – 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.
4.2 – Qualifiers
4.2.1 /ACP
Displays all Files-11 ACP parameters.
4.2.2 /ALL
Displays the values of all active parameters.
4.2.3 /CLUSTER
Displays all parameters specific to clusters.
4.2.4 /DYNAMIC
Displays all parameters that would be in effect immediately after
you enter a PARAMETERS WRITE ACTIVE command.
4.2.5 /GEN
Displays all general parameters.
4.2.6 /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.
4.2.7 /JOB
Displays all job controller parameters.
4.2.8 /LGI
Displays all LOGIN security control parameters.
4.2.9 /MAJOR
Displays the most important parameters.
4.2.10 /MULTIPROCESSING
Displays parameters specific to multiprocessing.
4.2.11 /NAMES
Displays only parameter names. You can combine other qualifiers
with this one.
4.2.12 /OBSOLETE
Displays the names of all obsolete system parameters.
4.2.13 /OUTPUT
Directs output to the specified file rather than SYS$OUTPUT.
Without a file specification, the output goes to SYSMAN.LIS in
the current directory.
4.2.14 /PAUSE
Controls the rate at which the system displays information about
parameters.
4.2.15 /PQL
Displays the parameters for all default process quotas.
4.2.16 /RMS
Displays all parameters specific to OpenVMS Record Management
Services (RMS).
4.2.17 /SCS
Displays all parameters specific to OpenVMS Cluster System
Communications Services.
4.2.18 /SPECIAL
Displays all special control parameters.
4.2.19 /STARTUP
Displays the name of the site-independent startup procedure.
4.2.20 /SYS
Displays all active system parameters.
4.2.21 /TTY
Displays all parameters for terminal drivers.
4.3 – Description
SYSMAN displays parameters in decimal unless you specify the /HEX
qualifier. ASCII values are always displayed in ASCII.
Abbreviations for parameter names must be unique because SYSMAN
displays the first parameter matching the abbreviation. Ambiguity
checks do not occur. For example, a specification of PARAMETERS
SHOW GBL displays the GBLSECTIONS parameter. To display the
GBLPAGFIL parameter, you must specify PARAMETERS SHOW GBLPAGF
to avoid displaying the GBLPAGES parameter.
You can use a period (.) to indicate that you want to work with
the system parameter that you specified in the last PARAMETERS
SET or PARAMETERS SHOW command.
5 – USE
Reads a set of system parameters into the work area for display
or modification.
Format
PARAMETERS USE source
5.1 – Parameter
source
The source of a system parameter file for data to be read into
the work area. The source can be any of the following items:
ACTIVE Read parameters from memory. When you invoke SYSMAN,
active values are in effect.
CURRENT Read parameters from the default system parameter file,
which is the source for parameters when you boot the
system. Using the current parameters requires read (R)
access to the system parameters file.
o On Alpha systems, the file that contains current
parameters is SYS$SYSTEM:ALPHAVMSSYS.PAR.
o On Integrity servers, the file that contains current
parameters is SYS$SYSTEM:IA64VMSSYS.PAR.
filespec Read parameters from a previously created system
parameter file. The default file type is .PAR. You need
read access to the file.
DEFAULT Read a parameter set containing the default values
for all parameters. These values are supplied with the
operating system.
5.2 – Description
Depending on the source you enter with the command, PARAMETERS
USE activates the parameter values:
o Stored in memory (ACTIVE)
o Stored in the default boot parameter file (CURRENT)
o From another file (filespec)
o From the system default values (DEFAULT)
5.3 – Example
SYSMAN> PARAMETERS USE DEFAULT
SYSMAN> SET STARTUP_P1 "MIN"
The first command activates the default parameter values that
are supplied with the operating system. The second command
sets the STARTUP_P1 system parameter to "minimum." This avoids
starting all layered products on a system that is not tuned for
them, which might cause the system to hang.
6 – WRITE
Writes the contents of the work area to memory, to disk, or to a
file, depending on the destination that you specify.
Format
PARAMETERS WRITE destination
6.1 – Parameter
destination
The destination of a new parameter file can be any of the
following ones:
ACTIVE Write parameters to memory. Using the ACTIVE parameter
requires CMKRNL privilege.
CURRENT Write parameters to the system parameters file, which
contains the current parameters on disk. Using the
current parameter requires write (W) access to the
system parameters file.
o On Alpha systems, the file that contains current
parameters is SYS$SYSTEM:ALPHAVMSSYS.PAR.
o On Integrity servers, the file that contains current
parameters is SYS$SYSTEM:IA64VMSSYS.PAR.
filespec Write parameters to a file. The default file type is
.PAR and you need write access to the file.
6.2 – Description
The PARAMETERS WRITE command writes the system parameter values
and the name of the site-independent startup command procedure
from the work area to the active system in memory, the current
system parameter file on disk, or your choice of a parameter
file. You can write only dynamic parameter values to the active
system.
Both the PARAMETERS WRITE ACTIVE and PARAMETERS WRITE CURRENT
commands send a message to OPCOM to record the event.
6.3 – Examples
1.SYSMAN> PARAMETERS WRITE SYS$SYSTEM:SPECIAL
This command creates a new parameter specification file.
2.SYSMAN> PARAMETERS WRITE CURRENT
This command modifies the current system parameter file on disk
(SYS$SYSTEM:ALPHAVMSSYS.PAR).