.\" Copyright (c) 1985, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\" %sccs.include.redist.roff%
.\" @(#)iostat.8 8.1 (Berkeley) %G%
statistics on terminal, disk and cpu
The options are as follows:
The first display is for the time since a reboot and each subsequent
report is for the time period since the last display.
interval is specified, the default is 1 second.
Extract values associated with the name list from the specified core
Extract the name list from the specified system instead of the default
seconds between each display.
is specified, the default is infinity.
displays its information in the following format:
.Bl -tag -width indent -compact
characters read from terminals
characters written to terminals
Disk operations (this field is system dependent).
The header of the field is the disk name and unit number.
If more than four disk drives are configured in the system,
displays only the first four drives.
to display specific drives, their names may be supplied on the command
.Bl -tag -width indent -compact
sectors transferred per second
milliseconds per average seek (including implied
seeks and rotational latency)
.Bl -tag -width indent -compact
% of cpu time in user mode
% of cpu time in user mode running niced processes
% of cpu time in system mode
% of cpu time in idle mode
.Bl -tag -width /dev/kmem -compact
The sections starting with ``Interpreting system activity'' in
.%T "Installing and Operating 4.3BSD" .