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Update section on DK_NDRIVES (which was removed with CAM), and explain

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relation to devstat(3)/(9).

Submitted-by:	ken@freebsd.org
This commit is contained in:
David E. O'Brien 1998-12-27 21:38:09 +00:00
parent 57814d04d4
commit d623448808
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=42105
1 changed files with 10 additions and 9 deletions
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19
usr.bin/systat/systat.1
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@ -304,16 +304,17 @@ the number and percentage of the translations that were
handled by the per process name translation cache.
.Pp
At the bottom left is the disk usage display.
It reports the number of seeks, transfers, and number
of kilobyte blocks transferred per second averaged over the
It reports the number of
kilobytes per transaction, transactions per second and megabytes
per second averaged over the
refresh period of the display (by default, five seconds).
For some disks it also reports the average milliseconds per seek.
Note that the system only keeps statistics on at most eight disks
(this is controlled by the constant
.Dv DK_NDRIVE
in
.Aq Pa sys/dkstat.h
as a kernel compile-time constant).
The system keeps statistics on most every storage device. In general, up
to seven devices are displayed. The devices displayed by default are the
first devices in the kernel's device list. See
.Xr devstat 3
and
.Xr devstat 9
for details on the devstat system.
.Pp
Under the date in the upper right hand quadrant are statistics
on paging and swapping activity.