src/usr.bin/systat/systat.1 - diff

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Diff for /src/usr.bin/systat/systat.1 between version 1.1 and 1.2

version 1.1, 1995/10/18 08:46:10

version 1.2, 1996/05/22 11:35:37

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.\" $NetBSD: systat.1,v 1.5 1995/09/27 19:46:12 jtc Exp $

.\" $NetBSD: systat.1,v 1.6 1996/05/10 23:16:39 thorpej Exp $

.\"

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.Nd display system statistics on a crt

.Sh SYNOPSIS

.Nm systat

.Op Fl display

.Op Fl M Ar core

.Op Fl N Ar system

.Op Fl w Ar wait

.Op Ar display

.Op Ar refresh-interval

.Sh DESCRIPTION

.Nm Systat

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.Pp

Command line options:

.Bl -tag -width "refresh_interval"

.It Fl Ns Ar display

.It Fl M Ar core

Extract values associated with the name list from

.Ar core

instead of the default

.Pa /dev/mem .

.It Fl N Ar system

Extracr the name list from

.Ar system

instead of the default

.Pa /netbsd .

.It Ar display

The

.Fl

flag expects

.Ar display

to be one of:

argument expects to be one of:

.Ic pigs ,

.Ic iostat ,

.Ic swap ,

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.Ic vmstat

.Ic netstat .

These displays can also be requested interactively (without the

These displays can also be requested interactively and are described in

.Dq Fl )

and are described in

full detail below.

.It Ar refresh-interval

The

.Ar refresh-value

.Ar refresh-interval

specifies the screen refresh time interval in seconds.

specifies the screen refresh time interval in seconds. This is provided

for backwards compatibility, and overrides the

.Ar refresh-interval

specified with the

.Fl w

flag.

.El

.Pp

Certain characters cause immediate action by

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in user mode running low priority processes (``nice''), in

system mode (``system''), and idle (``idle''). Statistics

on disk throughput show, for each drive, kilobytes of data transferred,

number of disk transactions performed, and average seek time

number of disk transactions performed, and time spent in disk accesses

(in milliseconds). This information may be displayed as

bar graphs or as rows of numbers which scroll downward. Bar

graphs are shown by default;

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Show the disk

.Tn I/O

statistics in bar graph form (default).

.It Cm msps

.It Cm secs

Toggle the display of average seek time (the default is to

Toggle the display of time in disk activity (the default is to

not display seek times).

not display time).

.El

.It Ic swap

Show information about swap space usage on all the

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on the free list.

.Pp

Below the memory display is the disk usage display.

It reports the number of seeks, transfers, and number

It reports the number of seeks, transfers, number

of kilobyte blocks transferred per second averaged over the

refresh period of the display (by default, five seconds).

refresh period of the display (by default, five seconds), and

For some disks it also reports the average milliseconds per seek.

the time spent in disk accesses.

Note that the system only keeps statistics on at most four disks.

.Pp

Below the disk display is a list of the