HP OpenVMS System Management Utilities Reference
Manual
Starting in OpenVMS Version 7.2, FAST_PATH is enabled by default. In
Versions 7.0 and 7.1, FAST_PATH was disabled by default.
For additional information, see FAST_PATH_PORTS.
FAST_PATH_PORTS
(Alpha and Integrity servers) FAST_PATH_PORTS is a static parameter
that deactivates Fast Path for specific drivers.
FAST_PATH_PORTS is a 32-bit mask, with a bit assigned for each Fast
Path port driver. The following table describes the bit values:
| Bit Value |
Description |
|
1
|
Indicates that Fast Path is disabled for ports serviced by the
corresponding driver.
|
|
0
|
Indicates that Fast Path is not disabled for ports serviced by the
corresponding driver.
|
Beginning in OpenVMS Version 7.3-1, values of specific bit positions
are those described in the following table:
| Bit Position |
Description |
|
0
|
Controls Fast Path for PKQDRIVER (for parallel SCSI).
|
|
1
|
Controls Fast Path for FGEDRIVER (for Emulex LP7000, LP8000, LP9002,
LP9802, LP10000 FibreChannel).
|
|
2
|
Controls Fast Path for PKADRIVER (for Adaptec AIC-78xx Ultra3 SCSI).
|
|
3
|
Controls Fast Path for PEDRIVER (for LAN).
|
|
4
|
Controls Fast Path for PKRDRIVER (for SMART Array 5300).
|
|
5
|
Controls Fast Path for PKMDRIVER, the LSI Logic LSI53C1030 SCSI port
driver.
|
|
6
|
Controls Fast Path for PGQDRIVER, the Qlogic ISP23xx FibreChannel port
driver.
|
Currently, the default setting for FAST_PATH_PORTS is 0, which means
that Fast Path is enabled for all drivers that appear in the table.
In addition, note the following:
- CI drivers are not controlled by FAST_PATH_PORTS. Fast Path for CI
is enabled and disabled exclusively by the FAST_PATH system parameter.
- FAST_PATH_PORTS is relevant only if the FAST_PATH system parameter
is enabled (equal to 1). Setting FAST_PATH to zero has the same effect
as setting all the bits in FAST_PATH_PORTS to 1.
For additional information, see FAST_PATH. For an explanation of how to
set the bits, see the OpenVMS I/O User's Reference Manual.
FREEGOAL (A,D,M)
FREEGOAL establishes the number of pages that you want to reestablish
on the free-page list following a system memory shortage. Memory
shortages occur when the system drops below the minimum number of pages
required on the free-page list (FREELIM). The value of FREEGOAL must
always be greater than or equal to the value of FREELIM.
FREELIM (A,M)
FREELIM sets the minimum number of pages that must be on the free-page
list.
The system writes pages from the modified-page list, swaps out working
sets, or reduces the size of the working sets to maintain the minimum
count.
While the larger free-page list generally means less page I/O, it also
means less space for the balance set, which tends to result in more
swap I/O. You can monitor the size of the free-page list, the amount of
page, and the amount of swap with the MONITOR IO command of the Monitor
utility.
GALAXY
(Alpha Galaxy platforms only) The GALAXY parameter sets memory sharing.
Specify one of the following:
| Value |
Description |
|
0
|
The default. Do not participate in a memory sharing.
|
|
1
|
Participate in a memory sharing.
|
When you set GALAXY to 1 in a hard partition, OpenVMS instances will
share memory between soft partitions within that hard partition. (You
can run more than two soft partitions in a hard partition, and you
might might not want to share memory among all of them.) Note that
GALAXY specifies only if a node uses shared memory. You do not need to
use the parameter to run multiple cooperative instances of OpenVMS; you
do this by console setup of the configuration tree that you want.
GBLPAGES (A,D,F,G,M)
GBLPAGES sets the number of global page table entries allocated at
bootstrap time. Each global section requires 1 global page table entry
per section page, plus 2 entries, with the total rounded up to an even
number.
Users with CMKRNL privilege can change this parameter on a running
system. Increasing the value of this parameter allows the global page
table to expand, on demand, up to the maximum size.
The default value is sufficient for the images normally installed as
shared in the system startup command procedures. Once the system is
running and all global sections are created, you can examine the actual
requirements with the /GLOBAL qualifier of the Install utility
(INSTALL) and reduce the value of GBLPAGES accordingly. However, do not
set the value of this parameter too low, because the page table entries
use little permanently resident memory. If you plan to install many
user images as shared, or if user programs are likely to create many
global sections, you must increase the value of this parameter.
GBLPAGFIL (A,D)
GBLPAGFIL defines the maximum number of systemwide pages allowed for
global page-file sections (scratch global sections that can be used
without being mapped to a file). These global page-file sections can be
temporary, permanent, system, or group, and are allocated from the page
file specified in the system process header at bootstrap time. When you
allow pages for global page-file sections, you must increase the size
of the page file accordingly. Users with CMKRNL privilege can change
this parameter value on a running system.
Global page-file sections are created with the Create and Map Section
system services ($CREATE_GPFILE, $CRMPSC, and $CRMPSC_GPFILE_64)
without an explicit disk file. These sections are used for the RMS
global buffers required for shared files. Users of shared files should
note that global page-file sections cause both the global page table
and the default system page file (PAGEFILE.SYS) to be used. If the
value of GBLPAGFIL is too small, $CRMPSC issues an error message when
you attempt to create global page-file sections.
You must have scratch global sections if you use RMS global buffers.
Each file using global buffers requires, in the system page file, the
file's bucket size multiplied by the number of global buffers for that
file. If the file's bucket size varies, as with RMS indexed files, use
the maximum bucket size. For shared sequential files, use the
multiblock count of the first stream to perform the $CONNECT service in
place of the file's bucket size.
The default value for this parameter is adequate for most systems.
However, if your site uses RMS global buffering to a significant
extent, you may need to raise the value of GBLPAGFIL. Use the /GLOBAL
qualifier of the Install utility to examine the number of pages
consumed by RMS global buffers. The global sections used by RMS for
global buffers have the prefix RMS$ followed by 8 hexadecimal digits.
Global buffers are enabled with the DCL command SET
FILE/GLOBAL_BUFFERS, which is described in the HP OpenVMS DCL Dictionary.
GBLSECTIONS (A,F,G,M)
GBLSECTIONS sets the number of global section descriptors allocated in
the system header at bootstrap time. Each global section requires one
descriptor. Each descriptor takes 32 bytes of permanently resident
memory.
The default value is sufficient for the images normally installed as
shared in the system startup command procedures. Once the system is
running and all global sections are created, you can examine the actual
requirements with the /GLOBAL qualifier of the Install utility and
reduce the value of GBLSECTIONS accordingly. However, the value of this
parameter should not be set too low. If you plan to install many user
images as shared, or if user programs are likely to create many global
sections, you must increase the value of this parameter.
If the value of GBLSECTIONS is too small, you receive a message from
the Install utility at system startup time or whenever you install
images manually. Note that too large a value for GBLSECTIONS wastes
physical memory.
GB_CACHEALLMAX (D)
(Alpha and Integrity servers) If a file is connected to RMS with the
RMS global buffer DEFAULT option enabled, the number of of blocks
cached is either a maximum of the GB_CACHEALLMAX parameter or a
percentage of the file, whichever results in a larger global count.
Note that although a maximum cache size of %x7FFFFFFF is supported for
an indexed file, sequential and relative file organizations are
restricted to a maximum cache size of 32767.
GB_DEFPERCENT (D)
(Alpha and Integrity servers) If a file is connected to RMS with the
RMS global buffer DEFAULT option enabled, either a percentage
(GB_DEFPERCENT) of the file is cached or up to GB_CACHEALLMAX blocks of
it are cached, whichever results in a larger global buffer count. A
percentage greater than 100 percent can be specified for GB_DEFPERCENT
to provide growing room for a file in the global cache.
Note that although a maximum cache size of %x7FFFFFFF is supported for
an indexed file, sequential and relative file organizations are
restricted to a maximum cache size of 32767.
GH_EXEC_CODE (A,F)
(Alpha and Integrity servers) GH_EXEC_CODE specifies the size in pages
of the execlet code granularity hint region.
GH_EXEC_DATA (A,F)
(Alpha and Integrity servers) GH_EXEC_DATA specifies the size in pages
of the execlet data granularity hint region.
GH_RES_CODE (A,F)
(Alpha and Integrity servers) GH_RES_CODE specifies the size in pages
of the resident image code granularity hint region.
GH_RES_CODE_S2
Specifies the size in pages of the resident 64-bit S2 space resident
image code granularity hint region.
GH_RES_DATA (A,F)
(Alpha and Integrity servers) GH_RES_DATA specifies the size in pages
of the resident image data granularity hint region.
If bit 2 of the LOAD_SYS_IMAGES parameter is set, the image LDR$WRAPUP
releases all unused pages in the granularity hint region at the the end
of system startup. The unused pages of the resident image granularity
hint region are either reserved for future use, or given back to the
free memory list.
GH_RSRVPGCNT (F)
GH_RSRVPGCNT specifies the number of pages in the resident image code
granularity hint region that the Install utility can use after the
system has finished booting.
If bit 2 of the LOAD_SYS_IMAGES parameter is set, the image LDR$WRAPUP
releases all unused pages in the granularity hint region at the the end
of system startup. The unused pages of the resident image granularity
hint region are either reserved for future use, or given back to the
free memory list.
GH_RSRVPGCNT specifies the number of pages that LDR$WRAPUP attempts to
leave in the resident image code granularity hint region. If the
GH_RSRVPGCNT number of pages is larger than the unused pages in the
granularity hint region, the region is not expanded to accommodate the
number of pages requested.
GLX_INST_TMO
(Alpha Galaxy platforms only) GLX_INST_TMO is the time (in
milliseconds) that an instance in a Galaxy sharing set can fail to
increment its timeout value before the other sharing instances presume
that the instance failed and remove it from the sharing set.
The default is 20,000 ms (20 seconds).
GLX_SHM_REG
For Alpha Galaxy systems, GLX_SHM_REG is the number of shared memory
region structures configured into the Galaxy Management Database
(GMDB). If set to 0, the default number of shared memory regions are
configured.
If the condition value SS$_INSF_SHM_REG is returned for the
$CRNMPSC_GDZRO_64 system service with the flag SEC$M_SHM_REG, the
Galaxy shared memory code has run out of internal SHM_REG data
structures. You need to increase the system parameter GLX_SHM_REG and
reboot all Galaxy instances with this larger parameter value.
GROWLIM (A,D,M)
GROWLIM sets the number of pages that the system must have on the
free-page list so that a process can add a page to its working set when
it is above quota. GROWLIM has no effect if the process is below its
working set quota. GROWLIM acts as a fast shutoff to the working set
extent mechanism based on the system's free memory.
IEEE_ADDRESS
IEEE_ADDRESS is reserved for HP use only.
IEEE_ADDRESSH
IEEE_ADDRESSH is reserved for HP use only.
IJOBLIM (D)
IJOBLIM sets the maximum number of interactive jobs that can be on the
system concurrently. You can control the maximum number of concurrent
interactive users on the system with the DCL command SET
LOGINS/INTERACTIVE.
IMGIOCNT
IMGIOCNT specifies the default number of pages of image I/O address
space to be allocated for the image activator if not specified at
program link time.
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
IMGREG_PAGES
(Alpha and Integrity servers) IMGREG_PAGES is the number of pages to
reserve in P1 space for images to be installed with shareable address
data. If IMGREG_PAGES is set to 0, no images are installed with shared
address data. The default is 10,000 pages.
For more information, see the INSTALL section in the HP OpenVMS System Management Utilities Reference Manual.
IO_PRCPU_BITMAP
(Alpha and Integrity servers) This parameter is a bitmap representing
up to 1024 CPUs. Each bit set in this bitmap indicates that the
corresponding CPU is available for use as a Fast Path preferred CPU.
IO_PRCPU_BITMAP defaults to all bits set. (CPU 0 through CPU 1023 are
all enabled for Fast Path port assignment.)
You might want to disable the primary CPU from serving as a preferred
CPU by leaving its bit clear in IO_PRCPU_BITMAP, which reserves the
primary CPU for non-Fast Path IO operations to use.
To change the value of IO_PRCPU_BITMAP in SYSBOOT or SYSGEN, specify a
list of individual bits or contiguous groups of bits. For example:
SYSGEN> SET IO_PRCPU_BITMAP 0,5,17-21
|
This command sets bits 0, 5, 17, 18, 19, 20, and 21 in the bitmap and
clears all other bits.
Changing the value of IO_PRCPU_BITMAP causes the FASTPATH_SERVER
process to run the automatic assignment algorithm that spreads Fast
Path ports evenly among the new set of usable CPUs.
For additional information, see FAST_PATH and FAST_PATH_PORTS.
This parameter replaces IO_PREFER_CPU.
IOTA
IOTA specifies the amount of time (in 10-millisecond units) to charge
to the current residence quantum for each voluntary wait. The correct
value approximates the cost of a disk I/O neglecting wait time.
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
IRPCOUNT (G,M)
IRPCOUNT sets the number of preallocated intermediate request packets.
Each packet requires 160 bytes of permanently resident memory. If
IRPCOUNT is too large, physical memory is wasted. If IRPCOUNT is too
small, the system increases its value automatically, as needed, to
permit proper performance. However, the system cannot increase IRPCOUNT
beyond the value of IRPCOUNTV.
Allowing this growth causes a physical memory penalty. If IRPCOUNT is
underconfigured, the penalty is 4 percent of physical memory from the
configured value to the actual value on the running system.
You can use the DCL command SHOW MEMORY/POOL/FULL to determine IRPCOUNT
usage.
IRPCOUNTV (G)
IRPCOUNTV establishes the upper limit to which IRPCOUNT can be
automatically increased by the system.
If this parameter is set too low, system performance can be adversely
affected because IRPCOUNTV cannot be used for nonpaged pool requests.
A physical memory penalty of 1 percent results for any unused growth
space (1 longword for every 3 unused intermediate request packets).
JBOBLIM
This parameter is no longer in use.
JOBCTLD
System managers do not usually alter JOBCTLD; this word of debug flags
is used in rolling upgrades of OpenVMS. If bit 0 is set, the queue
manager does not start. The default is 0.
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
KSTACKPAGES
(Alpha and Integrity servers) KSTACKPAGES controls the number of pages
allocated for process kernel stacks.
LAN_FLAGS (D)
(Alpha and Integrity servers) LAN_FLAGS is a bit mask used to enable
features in the local area networks port drivers and support code. The
default value for LAN_FLAGS is 0.
The bit definitions are as follows:
| Bit |
Description |
|
0
|
The default of zero indicates that ATM devices run in SONET mode. If
set to 1, this bit indicates ATM devices run in SDH mode.
|
|
1
|
If set, this bit enables a subset of the ATM trace and debug messages
in the LAN port drivers and support code.
|
|
2
|
If set, this bit enables all ATM trace and debug messages in the LAN
port drivers and support code.
|
|
3
1
|
If set, this bit runs UNI 3.0 over all ATM adapters.
|
|
4
1
|
If set, this bit runs UNI 3.1 over all ATM adapters.
|
|
5
|
If set, disables auto-negotiation over all Gigabit Ethernet Adapters.
|
|
6
|
If set, enables the use of jumbo frames over all Gigabit Ethernet
Adapters.
|
|
7
|
Reserved.
|
|
8
|
If set, disables the use of flow control over all LAN adapters that
support flow control.
|
|
9
|
Reserved.
|
|
10
|
Reserved.
|
|
11
|
If set, disables the logging of error log entries by LAN drivers.
|
|
12
|
If set, enables a fast timeout on transmit requests, usually between 1
and 1.2 seconds instead of 3 to 4 seconds, for most LAN drivers.
|
|
13
|
If set, transmits that are given to the LAN device and never completed
by the device (transmit timeout condition) are completed with error
status (SS$_ABORT) rather than success status (SS$_NORMAL).
|
1Auto-sensing of the ATM UNI version is enabled if both bit
3 and bit 4 are off (0).
LCKMGR_CPUID (D)
(Alpha and Integrity servers) LCKMGR_CPUID controls the CPU that the
Dedicated CPU Lock Manager runs on. This is the CPU that the
LCKMGR_SERVER process utilizes if you turn this feature on with the
LCKMGR_MODE system parameter.
If the specified CPU ID is either the primary CPU or a nonexistent CPU,
the LCKMGR_SERVER process utilizes the lowest nonprimary CPU. For more
information, see the LCKMGR_MODE system parameter.
LCKMGR_MODE (D)
(Alpha and Integrity servers) The LCKMGR_MODE parameter controls use of
the Dedicated CPU Lock Manager. Setting LCKMGR_MODE to a number greater
than zero (0) indicates the number of CPUs that must be active before
the Dedicated CPU Lock Manager is turned on.
The Dedicated CPU Lock Manager performs all locking operations on a
single dedicated CPU. This can improve system performance on large SMP
systems with high MP_Synch associated with the lock manager.
If the number of active CPUs is greater than or equal to LCKMGR_MODE, a
LCKMGR_SERVER process is created to service locking operations. This
process runs at a real-time priority of 63 and is always current.
In addition, if the number of active CPUs should ever be reduced below
the required threshold by either a STOP/CPU command or by a CPU
reassignment in a Galaxy configuration, the Dedicated CPU Lock Manager
automatically turns off within one second, and the LCKMGR_SERVER is
placed in a hibernate state. If the number of active CPUs is increased,
the LCKMGR_SERVER resumes servicing locking operations.
Specify one of the following:
- Zero (0) indicates that the Dedicated CPU Lock Manager is off (the
default).
- A number greater than zero (0) indicates the number of CPUs that
must be active before the Dedicated CPU Lock Manager will turn on.
When the Dedicated CPU Lock Manager is turned on, fast path devices are
not assigned to the CPU used by the Dedicated CPU Lock Manager.
When the Dedicated CPU Lock Manager is turned on, fast path devices are
not assigned to the CPU used by the Dedicated CPU Lock Manager.
For more information about use of the Dedicated CPU Lock Manager, see
the OpenVMS Performance Management manual.
LGI_BRK_DISUSER (D)
LGI_BRK_DISUSER turns on the DISUSER flag in the UAF record when an
attempted break-in is detected, thus permanently locking out that
account. The parameter is off (0) by default. You should set the
parameter (1) only under extreme security watch conditions, because it
results in severely restricted user service.
LGI_BRK_LIM (D)
LGI_BRK_LIM specifies the number of failures that can occur at login
time before the system takes action against a possible break-in. The
count of failures applies independently to login attempts by each user
name, terminal, and node. Whenever login attempts from any of these
sources reach the break-in limit specified by LGI_BRK_LIM, the system
assumes it is under attack and initiates evasive action as specified by
the LGI_HID_TIM parameter.
The minimum value is 1. The default value is usually adequate.
LGI_BRK_TERM (D)
LGI_BRK_TERM causes the terminal name to be part of the association
string for the terminal mode of break-in detection. When LGI_BRK_TERM
is set to off (0), the processing considers the local or remote source
of the attempt, allowing break-in detection to correlate failed access
attempts across multiple terminal devices. When set to on (1),
LGI_BRK_TERM assumes that only local hard-wired or dedicated terminals
are in use and causes breakin detection processing to include the
specific local terminal name when examining and correlating break-in
attempts.
Ordinarily, LGI_BRK_TERM should be set to off (0) when physical
terminal names are created dynamically, such as when network protocols
like LAT and Telnet are in use.
LGI_BRK_TMO (D)
LGI_BRK_TMO specifies the length of the failure monitoring period. This
time increment is added to the suspect's expiration time each time a
login failure occurs. Once the expiration period passes, prior failures
are discarded, and the suspect is given a clean slate.
LGI_CALLOUTS (D)
LGI_CALLOUTS specifies the number of installation security policy
callout modules to be invoked at each login. LGI_CALLOUTS must be set
to 0 unless callout modules are present.
LGI_HID_TIM (D)
LGI_HID_TIM specifies the number of seconds that evasive action
persists following the detection of a possible break-in attempt. The
system refuses to allow any logins during this period, even if a valid
user name and password are specified.
LGI_PWD_TMO (D)
LGI_PWD_TMO specifies, in seconds, the period of time a user has to
enter the correct system password (if used). LGI_PWD_TMO also
establishes the timeout period for users to enter their personal
account passwords at login time. Also, when using the SET PASSWORD
command, LGI_PWD_TMO specifies the period of time the system waits for
a user to type in a new password, an old password, and the password
verification.
LGI_RETRY_LIM (D)
LGI_RETRY_LIM specifies the number of retry attempts allowed users
attempting to log in. If this parameter is greater than 0, and a
legitimate user fails to log in correctly because of typing errors, the
user does not automatically lose the carrier. Instead (provided that
LGI_RETRY_TMO has not elapsed), by pressing the Return key, the user is
prompted to enter the user name and password again. Once the specified
number of attempts has been made without success, the user loses the
carrier. As long as neither LGI_BRK_LIM nor LGI_BRK_TMO has elapsed,
the user can dial in again and reattempt login.
LGI_RETRY_TMO (D)
LGI_RETRY_TMO specifies the number of seconds allowed between login
retry attempts after each login failure. (Users can initiate login
retries by pressing the Return key.) This parameter is intended to be
used with the LGI_RETRY_LIM parameter; it allows dialup users a
reasonable amount of time and number of opportunities to attempt logins
before they lose the carrier.
LNMPHASHTBL (A on VAX,G)
LNMPHASHTBL sets the size of the process logical name hash table.
Logical names are hashed using a function of the name length and
contents. The LNMPHASHTBL parameter determines the number of entries
for process-private logical names. The recommended setting is the
average number of process-private logical names. Note that the hashed
values are rounded up to the nearest power of 2.
LNMSHASHTBL (A,F,G)
LNMSHASHTBL sets the size of the system logical name hash table.
Logical names are hashed using a function of the name length and
contents. The LNMSHASHTBL parameter determines the number of entries
for shareable logical names. These names include all names from the
system, group, and job logical name tables. The recommended setting
allows one to four logical names per hash table entry. The default
setting is usually adequate, unless your installation has a large
number of groups, or many jobs are active simultaneously. In that case,
an increase in the value of the next higher power of 2 might improve
logical name translation performance. Note that the hashed values are
rounded up to the nearest power of 2.
LOAD_PWD_POLICY
LOAD_PWD_POLICY controls whether the SET PASSWORD command attempts to
use site-specific password policy routines, which are contained in the
shareable image SYS$LIBRARY:VMS$PASSWORD_POLICY.EXE. The default is 0,
which indicates not to use policy routines.
LOAD_SYS_IMAGES (A on Alpha and Integrity servers)
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
LOAD_SYS_IMAGES controls the loading of system images described in the
system image data file, VMS$SYSTEM_IMAGES. This parameter is a bit mask.
On Alpha and Integrity servers, the following bits are defined:
| Bit |
Description |
|
0 (SGN$V_LOAD_SYS_IMAGES)
|
Enables loading alternate execlets specified in VMS$SYSTEM_IMAGES.DATA.
|
|
1 (SGN$V_EXEC_SLICING)
|
Enables executive slicing.
|
|
2 (SGN$V_RELEASE_PFNS)
|
Enables releasing unused portions of the Alpha and Integrity servers
huge pages.
|