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Displaying System Statistics Using SYSDPY
The SYSDPY program allows you to display system status and the status
of network links and user jobs, formatted for your particular type of
terminal. SYSDPY features a display-oriented output format with many
commands for controlling the types of information to include in the
When you first start the SYSDPY program, it displays the status of the
user jobs and the system statistics. It is ready to receive user
commands at any time. Your commands are not echoed on the screen, but
are reflected in the changes in the display.
To start the SYSDPY program, type the R command followed by the
special version of SYSDPY that is designed for your type of terminal.
The different versions of SYSDPY and the terminal types for which they
are designed are:
SYSDPA DIGITAL VT05A
SYSDPB DIGITAL VT05B (2400 baud)
SYSDPY DIGITAL VT06 (Datapoint 3300)
SYSVBX DIGITAL VB10C graphics display
SYSV50 DIGITAL VT50
SYSV52 DIGITAL VT52
SYSV61 DIGITAL VT61
SYSANS DIGITAL VT100 or other ANSI terminal
SYSDLT Delta Data Telterm
SYSHLZ Hazeltine 2000
Any unprivileged user can run SYSDPY, but the output of certain system
statistics is restricted to privileged jobs only. If you are logged
in as [1,2], or your job has SPY privileges, you can use all available
When SYSDPY first starts running, it displays the normal job and
system status (equivalent to the N command). At any time, you can
type any of the one-letter commands described below, which change
either the type of information displayed, or allow you to control the
display of information. The file DOC:SYSDPY.MAN contains a full
description of the information in the various displays. You do not
need to press RETURN after you type a SYSDPY command. To exit from
SYSDPY, type <CTRL/Z> or <CTRL/C>.
If you need help, type H. This prints a short listing of available
Commands to SYSDPY are:
A Changes SYSDPY's normal scroll setting to no-scroll. SYSDPY
usually scrolls through the display, advancing one screenful
each update pass. (Refer to the + and - commands.)
C Displays the DECnet link status for all open links on the
E Displays Ethernet status. This includes all Ethernet
channels, all KLNI controllers, and enabled protocol types.
The E command summarizes datagram traffic and the free queue
F Lists file system statistics for each disk unit in the system.
This information includes I/O counts, error summaries,
structure membership, and a summary of swapping units.
H Lists the help text.
I Lists incremental statistics, which are changes in certain
values since the last update cycle. The values incremented
are: system uptime, job runtimes, disk reads and writes, CPU
statistics, network I/O (byte) counts, TTY I/O counts, and
network message counts. A + (plus sign) immediately preceding
the uptime value indicates incremental mode.
J Lists jobs only, without any system statistics. The jobs are
listed in columns.
K Displays CI network information, including open paths to nodes
on the CI network, packet transmission and reception counts,
and port recoverable error counts.
L Writes the contents of the screen to the file
LPT:SYSDPY.LOG[-]. SYSDPY logs the screen each time it is
updated. If this log file already exists, SYSDPY appends the
new data to it. A form feed separates each screen. Typing
<CTRL/Z> to SYSDPY closes the file.
M Lists normal job data and an expanded memory summary showing
both virtual and physical job memory usage. The M job display
does not show system statistics.
N Lists the default statistics, which include a column of job
status information, and a column of system status information.
Some of the system statistics listed are CPU idle and lost
time, and available disk structures.
O Suppresses statistics from [1,2] jobs for the J, N, and M
displays. A second O command resumes display of [1,2] jobs.
Q Lists the system queues, just as the QUEUE program does, but
in DPY mode. This command requires GALAXY Version 4 or later.
R Refreshes the entire screen immediately. SYSDPY automatically
refreshes the screen at various intervals, depending on the
terminal in use. The R command resets the automatic refresh
S Changes the SYSDPY display from the default to the disk reads,
disk writes, and the user name for all jobs listed in the N
display. SYSDPY resumes displaying system statistics when you
type the S command a second time.
T Displays ANF network topology and the NCL numbers associated
with each node. This display requires PEEK or SPY privileges.
V Attempts to lock SYSDPY in memory and run it in a high
priority run queue (HPQ). In addition, SYSDPY updates the
screen once per second, unless you previously set the update
time to another value (using the W command). A second V
command clears the lock and HPQ setting, and restores the
update time to ten seconds. If you issued a SET HPQ command
before running SYSDPY, the V command locks the job, but
doesn't change the HPQ.
SYSDPY automatically clears the V state after 1000 update
cycles, or if you issue a Q command. The system does not
issue an error message if SYSDPY fails to lock or run in HPQ.
This command requires LOCK or HPQ privileges.
nW Sets the wait time between screen updates to n seconds. The
default update time is ten seconds, and one second for the V
display. You may specify n as any number between 0 and 60.
Zero means one clock tick. If you do not specify a time,
SYSDPY assumes the default wait time of ten seconds.
Z Lists all known LAT servers and some LAT traffic statistics.
\ Displays ANF network statistics. This information includes
the number of network messages sent and received according to
message type (such as DATA or NEIGHBORS), a histogram of the
data messages sent and received as a function (log base 2) of
the data message size, and network free core usage.
* Displays the DECnet node status for all nodes in the DECnet
network. Use the A command to change the display from all
network nodes to just those nodes with active links. Use the
^ command (described below) to change the display from all
known nodes to only those nodes with which the local node has
n+ Advances the screen by n lines or n jobs, depending on the
current display. If you do not specify n, SYSDPY advances one
screen. When you type the + command, you clear auto-scroll
(refer to the A command).
n- Scrolls the screen backwards by n lines or jobs, depending on
the current display. If you do not specify n, SYSDPY reverses
one screen. When you type the - command, you clear
auto-scroll (refer to the A command).
! Displays idle jobs or DECnet nodes, depending on the current
display. Typing the ! command again stops display of idle
jobs or nodes.
# Changes the listing in the "Where" column of the job display
from the PTY number to the controlling job number of a job
being controlled by another job.
% Changes the listing in the "Runtime" column of the job display
from the actual runtime to the percentage of the CPU that the
^ Eliminates certain statistics from the display. For the N
display, the first part of the system statistics are
eliminated, for a DECnet display, non-valid delay time nodes
are not shown, and for the F display, error summary
information is not included.
<ESC> Freezes the current screen until you type another command.
SPACE Updates the screen display immediately, but does not change
any SYSDPY parameters.
The SYSDPY program:
Destroys your core image.
Places your terminal at user level.