HP OpenVMS System Management Utilities Reference
Manual
If firmware or hardware support for the power-off request is not
implemented, the shut-down procedure will leave the system halted but
fully powered.
PQL_DASTLM (D,G)
PQL_DASTLM sets the default limit on the number of pending ASTs for a
process created by the Create Process ($CREPRC) system service or the
DCL command RUN (Process).
PQL_DBIOLM (D,G)
PQL_DBIOLM sets the default buffered I/O count limit for the number of
outstanding buffered I/O operations permitted to a process created by
the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_DBYTLM (D,G)
PQL_DBYTLM sets the default buffered I/O byte count limit for the
amount of buffered space available to a process created by the Create
Process ($CREPRC) system service or the DCL command RUN (Process).
PQL_DCPULM (D,G)
PQL_DCPULM sets the default CPU time limit for a process created by the
Create Process ($CREPRC) system service or the DCL command RUN
(Process). PQL_DCPULM specifies the time limit in increments of 10
milliseconds.
The default value of 0 imposes no limit on CPU time usage and is
typically the correct value for this parameter.
PQL_DDIOLM (D,G)
PQL_DDIOLM sets the default direct I/O limit for a process created by
the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_DENQLM (D,G)
PQL_DENQLM sets the default enqueue limit for a process created by the
Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_DFILLM (D,G)
PQL_DFILLM sets the default open file limit for a process created by
the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_DJTQUOTA (D)
PQL_DJTQUOTA sets the default job table byte count quota for a process
created by the Create Process ($CREPRC) system service or the DCL
command RUN (Process). PQL_DJTQUOTA specifies the number of bytes of
paged pool allocated to the job table. The default value is usually
adequate, unless a large number of job logical names or temporary
mailboxes are used.
PQL_DPGFLQUOTA (A on VAX,D,G)
PQL_DPGFLQUOTA sets the default page file quota for a process created
by the Create Process ($CREPRC) system service or the DCL command RUN
(Process). HP recommends that this parameter not be smaller than the
PQL_DWSEXTENT parameter.
PQL_DPRCLM (D,G)
PQL_DPRCLM sets the default subprocess limit for a process created by
the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_DTQELM (D,G)
PQL_DTQELM sets the default number of timer queue entries for a process
created by the Create Process ($CREPRC) system service or the DCL
command RUN (Process).
PQL_DWSDEFAULT (A,G)
PQL_DWSDEFAULT sets the default working set size for a process created
by the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_DWSEXTENT (A,D,G)
PQL_DWSEXTENT sets the default working set extent for a process created
by the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_DWSQUOTA (A,D,G)
PQL_DWSQUOTA sets the default working set quota for a process created
by the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_MASTLM (D,G)
PQL_MASTLM sets a minimum limit on the number of pending ASTs for a
process created by the Create Process ($CREPRC) system service or the
DCL command RUN (Process).
PQL_MBIOLM (D,G)
PQL_MBIOLM sets the minimum buffered I/O limit for a process created by
the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_MBYTLM (D,G)
PQL_MBYTLM sets the minimum buffered I/O byte limit for a process
created by the Create Process ($CREPRC) system service or the DCL
command RUN (Process).
PQL_MCPULM (D,G)
PQL_MCPULM sets the minimum CPU time limit in increments of 10
milliseconds for a process created by the Create Process ($CREPRC)
system service or the DCL command RUN (Process).
PQL_MDIOLM (D,G)
PQL_MDIOLM sets the minimum direct I/O limit for a process created by
the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_MENQLM (D,G)
PQL_MENQLM sets the minimum limit on the number of locks that can be
queued at one time by a process created by the Create Process ($CREPRC)
system service or the DCL command RUN (Process).
PQL_MFILLM (D,G)
PQL_MFILLM sets the minimum open file limit for a process created by
the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_MJTQUOTA (D)
PQL_MJTQUOTA sets the minimum job table byte count quota for a process
created by the Create Process ($CREPRC) system service or the DCL
command RUN (Process).
PQL_MPGFLQUOTA (A on VAX,D,G)
On VAX systems, PQL_MPGFLQUOTA sets the minimum page file quota for a
process created by the Create Process ($CREPRC) system service or the
DCL command RUN (Process). HP recommends that this parameter be no
smaller than PQL_MWSEXTENT.
On Alpha and I64 systems, PQL_MPGFLQUOTA sets the minimum pagelet file
quota for a process created by the Create Process ($CREPRC) system
service or the DCL command RUN (Process).
PQL_MPRCLM (D,G)
PQL_MPRCLM sets the minimum subprocess limit for a process created by
the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
PQL_MTQELM (D,G)
PQL_MTQELM sets the minimum number of timer queue entries for a process
created by the Create Process ($CREPRC) system service or the DCL
command RUN (Process).
PQL_MWSDEFAULT (A,G)
PQL_MWSDEFAULT sets the minimum default working set size for a process
created by the Create Process ($CREPRC) system service or the DCL
command RUN (Process).
This value overrides a smaller quantity that is set for a user in
AUTHORIZE.
PQL_MWSEXTENT (A,D,G)
PQL_MWSEXTENT sets the minimum working set extent for a process created
by the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
This value overrides a smaller quantity set for a user in AUTHORIZE.
PQL_MWSQUOTA (A,D,G)
PQL_MWSQUOTA sets the minimum working set quota for a process created
by the Create Process ($CREPRC) system service or the DCL command RUN
(Process).
This value overrides a smaller quantity set for a user in AUTHORIZE.
PRCPOLINTERVAL (A on Alpha and I64,D)
PRCPOLINTERVAL specifies, in seconds, the polling interval used to look
for Systems Communications Services (SCS) applications, such as the
connection manager and mass storage control protocol disks, on other
nodes. All discovered nodes are polled during each interval.
This parameter trades polling overhead against quick recognition of new
systems or servers as they appear.
PRIORITY_OFFSET
PRIORITY_OFFSET specifies the difference in priority required by the
scheduler for one process to preempt the current process. A value of 2,
for example, means that if the current process is executing at priority
1, a computable process at priority 2 or 3 is not allowed to preempt
the current process. However, a priority 4 or higher process can
preempt the current process. This mechanism affects only normal
priority (0-15) processes. The default value 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.
PROCSECTCNT (A,G)
PROCSECTCNT sets the number of section descriptors that a process can
contain. Each section descriptor increases the fixed portion of the
process header by 32 bytes.
Set a value greater than the maximum number of image sections in any
section to be run, as indicated by the linkage memory allocation map
for the image.
PSEUDOLOA
(VAX only) PSEUDOLOA specifies (in pages) the size of the PDA0 system
image. PSEUDOLOA is used to boot standalone BACKUP from magnetic tape.
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
PU_OPTIONS
PU_OPTIONS is reserved for HP use only.
QDSKINTERVAL
QDSKINTERVAL establishes, in seconds, the disk quorum polling interval.
The default value is 3.
QDSKVOTES
QDSKVOTES specifies the number of votes contributed by a quorum disk in
a cluster.
QUANTUM (A on Alpha and I64,D,M)
QUANTUM defines the following:
- Processor time: maximum amount of processor time a process can
receive before control passes to another process of equal priority that
is ready to compute
- Balance set residency: minimum amount of service a compute-state
process must receive before being swapped out to secondary storage
RAD_SUPPORT (G)
(Alpha only) RAD_SUPPORT enables RAD-aware code to be executed on
systems that support Resource Affinity Domains (RADs); for example,
AlphaServer GS160 systems. A RAD is a set of hardware components (CPUs,
memory, and I/O) with common access characteristics.
Bits are defined in the RAD_SUPPORT parameter as follows:
RAD_SUPPORT (default is 79; bits 0-3 and 6 are set)
___________________________________________________
3 2 2 2 2 1 1
1 8 7 4 3 6 5 8 7 0
+-----+-----+-----------+-----------+-----------+
|00|00| skip|ss|gg|ww|pp|00|00|00|00|0p|df|cr|ae|
+-----+-----+-----------+-----------+-----------+
Bit 0 (e): Enable - Enables RAD support
Bit 1 (a): Affinity - Enables Soft RAD Affinity (SRA) scheduling
Also enables the interpretation of the skip
bits, 24-27.
Bit 2 (r): Replicate - Enables system-space code replication
Bit 3 (c): Copy - Enables copy on soft fault
Bit 4 (f): Fault - Enables special page fault allocation
Also enables the interpretation of the
allocation bits, 16-23.
Bit 5 (d): Debug - Reserved to HP
Bit 6 (p): Pool - Enables per-RAD non-paged pool
Bits 7-15: - Reserved to HP
Bits 16-23: - If bit 4 is set, bits 16-23 are interpreted
as follows:
Bits 16,17 (pp): Process = Pagefault on process (non global)
pages
Bits 18,19 (ww): Swapper = Swapper's allocation of pages for
processes
Bits 20,21 (gg): Global = Pagefault on global pages
Bits 22,23 (ss): System = Pagefault on system space pages
Encodings for pp, ww, gg, ss:
Current (0) - allocate PFNs from the current CPU's RAD
Random (1) - allocate PFNs using the "random" algorithm
Base (2) - allocate PFNs from the operating system's "base"
RAD
Home (3) - allocate PFNs from the current process's home RAD
If bits 16-23 are 0, the defaults for pp, ww, gg, ss are interpreted
as follows:
Process = home RAD
Swapper = current RAD (also sets home RAD for process)
Global = random RAD
System = base RAD
Bits 24-27: - If bit 1 is set, bits 24-27 are interpreted
as a skip count value (power of 2). Example: If
bits 24-27 contain a 3, the skip count is 8.
If bits 24-27 contain a 5, the skip count is 32.
If bits 24-27 are 0, the default of 16 is used
as the skip count.
Bits 28-31: - Reserved to HP
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For more information about using OpenVMS RAD features, see the
OpenVMS Alpha Galaxy and Partitioning Guide.
REALTIME_SPTS (D,G,M)
(VAX only) REALTIME_SPTS reserves a number of system page table entries
for mapping connect-to-interrupt processes into system space. This
value should normally remain at the default (0) in an environment that
is not real-time. Where connect-to-interrupt processes do use the
system, this value should represent the maximum number of pages that
all concurrent connect-to-interrupt processes must map into system
space. See the OpenVMS VAX Device Support Manual (archived).
RECNXINTERVAL (A on Alpha and I64,D)
RECNXINTERVAL establishes the polling interval, in seconds, during
which to attempt reconnection to a remote system.
RESALLOC
RESALLOC controls whether resource allocation checking is performed.
The default value of 0 disables resource allocation checking.
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
RESHASHTBL (A,F,M)
RESHASHTBL defines the number of entries in the lock management
resource name hash table. Each entry requires 4 bytes. A typical tuning
goal is to have the RESHASHTBL parameter about four times larger than
the total number of resources in use on the system. Managers of systems
with memory constraints or systems that are not critically dependent on
locking speed could set the table to a smaller size.
RJOBLIM (D)
RJOBLIM defines the maximum number of remote terminals allowed in the
system at any one time.
RMS_CONPOLICY (D)
RMS_CONPOLICY specifies the policy to be used for dealing with
high-contention write-shared files. This dynamic parameter can be used
to ensure fairness between lock conversions and new lock requests.
Possible values are the following:
| Value |
Explanation |
|
NEVER
|
(Default) Never use the higher overhead option to improve fairness for
any write-shared files accessed on the system; minimal overhead.
|
|
SOMETIMES
|
Use this option for fairer bucket access (but higher overhead) to any
write-shared files with global buffers enabled that are accessed on the
system.
|
|
ALWAYS
|
Use this option for fairer bucket access (but higher overhead) to all
write-shared files accessed on the system.
|
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM/CONTENTION_POLICY=value and display the parameter
with the DCL command SHOW RMS_DEFAULT.
RMSD* (D)
RMSD1, RMSD2, RMSD3, RMSD4, RMSD5, RMSD6, and RMSD7 are special
parameters reserved for HP use.
RMS_DFLRL (D)
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
RMS_DFMBC (A,D)
RMS_DFMBC specifies a default multiblock count only for record I/O
operations, where count is the number of blocks to be
allocated for each I/O buffer.
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM and display the parameter with the SHOW RMS_DEFAULT
command.
RMS_DFMBFIDX (A,D)
RMS_DFMBFIDX establishes the default RMS multibuffer count for indexed
sequential disk operations. This value defines the number of I/O
buffers that RMS allocates for each indexed file. For sequential
access, a larger number that allows some of the index buckets to remain
in memory can improve performance.
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM and display the parameter with SHOW RMS_DEFAULT.
RMS_DFMBFREL (A,D)
RMS_DFMBFREL establishes the default RMS multibuffer count for relative
disk operations. This value defines the number of I/O buffers that RMS
allocates for each relative file.
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM and display the parameter with SHOW RMS_DEFAULT.
RMS_DFMBFSDK (A,D)
RMS_DFMBFSDK establishes the default RMS multibuffer count for
sequential disk operations. This value defines the number of I/O
buffers that RMS allocates for sequential disk files.
The default value is usually adequate. However, if read-ahead or
write-behind operations are used, a larger number improves performance.
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM and display the parameter with SHOW RMS_DEFAULT.
RMS_DFMBFSMT (A,D)
RMS_DFMBFSMT establishes the default RMS multibuffer count for magnetic
tape operations. This value defines the number of I/O buffers that RMS
allocates for magnetic tape files.
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM and display the parameter with SHOW RMS_DEFAULT.
RMS_DFMBFSUR (A,D)
RMS_DFMBFSUR establishes the default multibuffer count for unit record
devices.
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM and display the parameter with SHOW RMS_DEFAULT.
RMS_DFNBC (A,D)
RMS_DFNBC specifies a default block count for network access to remote,
sequential, indexed sequential, and relative files.
The network block count value represents the number of blocks that RMS
is prepared to allocate for the I/O buffers used to transmit and
receive data. The buffer size used for remote file access, however, is
the result of a negotiation between RMS and the remote file access
listener (FAL). The buffer size chosen is the smaller of the two sizes
presented.
Thus, RMS_DFNBC places an upper limit on the network buffer size that
is used. It also places an upper limit on the largest record that can
be transferred to or from a remote file. In other words, the largest
record that can be transferred must be less than or equal to RMS_DFNBC
multiplied by 512 bytes.
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM and display the parameter with SHOW RMS_DEFAULT.
RMS_EXTEND_SIZE (D)
RMS_EXTEND_SIZE specifies the number of blocks by which files are
extended as they are written. This number should be chosen to balance
the amount of extra disk space wasted at the ends of each file against
the performance improvement provided by making large extents
infrequently.
When small disk quotas are used, specify a small number such as the
disk cluster size to prevent the user's disk quota from being consumed.
If the value of 0 is used, RMS allocates large extents and truncates
the file back to its actual usage when it closes.
You can set this system parameter with the DCL command SET
RMS_DEFAULT/SYSTEM and display the parameter with SHOW RMS_DEFAULT.
RMS_FILEPROT
RMS_FILEPROT determines the default file protection for system
processes such as those that create the error log, operator log, and
job controller. It also determines default file protection for
processes created by the job controller (all interactive and batch
processes).
Because a process always inherits its default file protection from its
creator process, RMS_FILEPROT determines default file protection only
for users who do not execute the DCL command SET PROTECTION/DEFAULT in
their login command procedures or during interactive sessions.
The protection is expressed as a mask. (See the discussion of the
$CRMPSC system service in the HP OpenVMS System Services Reference Manual for more information about
specifying protection masks.) By default, the mask is 64000 (decimal)
or FA00 (hexadecimal), which represents the following protection:
RMS_HEURISTIC (D)
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
RMS_PROLOGUE (D)
RMS_PROLOGUE specifies the default prologue RMS uses to create indexed
files. The default value 0 specifies that RMS should determine the
prologue based on characteristics of the file. A value of 2 specifies
Prologue 2 or Prologue 1, and 3 specifies Prologue 3. The RMS prologues
are described in the OpenVMS Record Management Services Reference Manual.
RMS_SEQFILE_WBH (D)
(Alpha and I64) RMS_SEQFILE_WBH can enable the RMS writebehind feature
as a system default for any unshared sequential disk file if the file
is opened for image I/O with write access specified. The possible
settings are the following:
| Setting |
Description |
|
0 (default)
|
Do not enable writebehind feature. Preserve prior behavior of using
writebehind only if the user requests it by setting RAB$V_WBH in
RAB$L_ROP.
|
|
1
|
Enable writebehind feature as system default, including the allocation
of at least two local buffers.
|
RSRVPAGCNT
This parameter has been obsolete on Alpha systems since OpenVMS Version
7.2, and it does not exist on I64 systems.
On VAX systems, RSRVPAGCNT sets the number of pages that are reserved
and escrowed for the current process page file.
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
S0_PAGING
S0_PAGING controls paging of system code:
- Setting bit 0 disables paging of all Exec code and data.
- Setting bit 1 disables paging of all RMS code and data.
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
S2_SIZE
(Alpha and I64) S2_SIZE is the number of megabytes to reserve for S2
space. This value does not include the size required for extended file
cache (XFC).
SAVEDUMP
If the dump file is saved in the page file, SAVEDUMP specifies whether
the page file is saved until the dump file is analyzed. The default
value 0 specifies that the page file should not be retained. A value of
1 specifies that the dump written to the page file should be retained
until either copied or released using the SDA utility.
SCH_CTLFLAGS (D)
Special DYNAMIC parameter reserved for HP use.
SCH_HARD_OFFLD (D)
The scheduler hard off-load parameter is a CPU bitmask parameter. The
bits correspond to CPU IDs. For any bit set, the OpenVMS scheduler does
not schedule processes on this CPU unless the process has hard affinity
set for the CPU. The bit corresponding to the primary CPU is ignored.
SCH_SOFT_OFFLD (D)
The scheduler soft off-load parameter is a CPU bitmask parameter. The
bits correspond to CPU IDs. For any bit set, the OpenVMS scheduler
tries to avoid scheduling processes on this CPU. However, if no other
idle CPUs exist, processes are still scheduled on this CPU.
SCSBUFFCNT (A,F,G)
On VAX systems, SCSBUFFCNT is the number of buffer descriptors
configured for all systems communication architecture (SCA). If an SCA
device is not configured on your system, this parameter is ignored.
Generally speaking, each data transfer needs a buffer descriptor and
thus the number of buffer descriptors can be a limit on the number of
possible simultaneous I/Os. Various performance monitors report when a
system is out of buffer descriptors for a given workload which is an
indication that a larger value for SCSBUFFCNT is worth considering.
Note that AUTOGEN provides feedback for this parameter on VAX systems
only.
On Alpha and I64 systems, the system communication services (SCS)
buffers are allocated as needed, and SCSBUFFCNT is reserved for HP use
only.
SCSFLOWCUSH (D)
Specifies the lower limit for receive buffers at which point system
communication services (SCS) starts to notify the remote SCS of new
receive buffers. For each connection, SCS tracks the number of receive
buffers available. SCS communicates this number to the SCS at the
remote end of the connection. However, SCS does not need to do this for
each new receive buffer added. Instead, SCS notifies the remote SCS of
new receive buffers if the number of receive buffers falls as low as
the SCSFLOWCUSH value.
The default value is adequate on most systems. If a systems
communication architecture (SCA) port is not configured on your system,
this parameter is ignored.
SCSI_ERROR_POLL (D)
If an error occurs while a particular initiator is accessing a SCSI
device, that error is latched for all other initiators and is not
unlatched and reported to the other initiators until the next time they
access the device. Therefore, if the other initiators do not access the
device in a timely manner, the reporting of the error can be greatly
delayed, which can cause confusion.
The purpose of SCSI_ERROR_POLL is to cause OpenVMS to send a SCSI Test
Unit Ready command every hour to each SCSI disk, in an attempt to force
latched errors to become unlatched and to be reported immediately.
SCSI_ERROR_POLL has a default value of 1. It can, however, be set to 0
by the user in order to stop the error polling activity.
The parameter affects SCSI disks connected by Fibre Channel as well as
parallel SCSI. If the disk has multiple paths, then the error polling
is performed on all non-served paths to the disk. Tapes and other
non-disk devices are not subject to this error polling, regardless of
the parameter setting.
SCSI_NOAUTO (D)
(VAX only) This special parameter is used by HP and is subject to
change. Do not change this parameter unless HP recommends that you do
so.
SCSI_NOAUTO prevents the loading of a disk or tape SCSI class driver
for any given device ID in a configuration that includes a SCSI
third-party device. The SCSI_NOAUTO system parameter stores a bit mask
of 32 bits, where the low-order byte corresponds to the first SCSI bus
(PKA0), the second byte corresponds to the second SCSI bus (PKB0), and
so on, as follows:
For each SCSI bus, setting the low-order bit inhibits automatic
configuration of the device with SCSI device ID 0; setting the second
low-order bit inhibits automatic configuration of the device with SCSI
device ID 1, and so forth. For instance, the value 00002000_16 prevents
the device with SCSI ID 5 on the bus identified by SCSI port ID B from
being configured. By default, all the bits in the mask are cleared,
allowing all devices to be configured.
SCSICLUSTER_P[1-4]
(Alpha only) SCSICLUSTER_P[1-4] parameters allow non-HP peripherals
(CPU-lookalikes) in SCSI clusters.
This special parameter is used by HP and is subject to change. Do not
change this parameter unless HP recommends that you do so.
SCSMAXDG (G)
This parameter is reserved for HP use only.
SCSMAXMSG (G)
This parameter is reserved for HP use only.
SCSNODE (A,G)
SCSNODE specifies the name of the computer. This parameter is not
dynamic.
Specify SCSNODE as a string of up to six characters. Enclose the string
in quotation marks.
Note
The maximum size of six characters is strictly enforced. SYSBOOT
truncates the value of SCSNODE if the size of the system parameter is
set to more than six characters.
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If the computer is in an OpenVMS Cluster, specify a value that is
unique within the cluster. Do not specify the null string.
If the computer is running DECnet for OpenVMS, the value must be the
same as the DECnet node name.
SCSRESPCNT (A,F,G)
SCSRESPCNT is the total number of response descriptor table entries
(RDTEs) configured for use by all system applications.