.TH IOSTAT 1
.SH NAME
iostat, load, dkstat \- report I/O and CPU statistics
.SH SYNOPSIS
.B iostat
[ interval [ count ] ]
.PP
.B load
[ interval [ count [ sysfile [ corefile ] ] ] ]
.PP
.B dkstat
[ interval [ count ] ]
.SH DESCRIPTION
.I iostat
periodically reports the number of characters read and written to terminals,
and, for each disk, the number of seeks and transfers per second,
and average milliseconds per seek.
It also reports the percentage of time the system has
spent in user mode, in user mode running low priority (niced) processes,
in system mode, and idling.
The first report is for all time since a reboot and each
subsequent report is for the last interval only.
.PP
.I load
periodically reports the number of
processes ready to run averaged over the preceding 1, 5, and 15 minutes.
.PP
.I dkstat
periodically reports the number of packets received and sent over 
the Datakit network, together with error reports if any occurred.
The first report is for all time since a reboot and each
subsequent report is for the last interval only.
.PP
The optional
.I interval
argument causes
a report once each
.I interval
seconds.
.PP
The optional
.I count
argument restricts the number of reports.
.PP
The optional arguments
.I sysfile
and
.I corefile
cause the named files to be consulted instead of the defaults,
`/unix' and `/dev/kmem'.
.SH FILES
/dev/kmem
.br
/unix
.SH SEE ALSO
sysmon(9.1),
vmstat(8)