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Full Discussion: vmstat
Top Forums UNIX for Dummies Questions & Answers vmstat Post 69618 by Perderabo on Sunday 17th of April 2005 11:09:46 PM
Old 04-18-2005
vmstat obtains some counters from the kernel. Then it waits a second, then it obtains the counters again. At this point, it can tell you what happened over the past second. When it prints that first line, it doesn't have any previous history. So many of the values on the first line are useless. Some versions of vmstat suppress that first line.
 

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RTACCT(8)						      System Manager's Manual							 RTACCT(8)

NAME
nstat, rtacct - network statistics tools. SYNOPSIS
Usage: nstat [ -h?vVzrnasd:t: ] [ PATTERN [ PATTERN ] ] Usage: rtacct [ -h?vVzrnasd:t: ] [ ListOfRealms ] DESCRIPTION
nstat and rtacct are simple tools to monitor kernel snmp counters and network interface statistics. OPTIONS
-h, --help Print help -V, --version Print version -z, --zero Dump zero counters too. By default they are not shown. -r, --reset Reset history. -n, --nooutput Do not display anything, only update history. -a, --ignore Dump absolute values of counters. The default is to calculate increments since the previous use. -s, --noupdate Do not update history, so that the next time you will see counters including values accumulated to the moment of this measurement too. -j, --json Display results in JSON format. -d, --interval <INTERVAL> Run in daemon mode collecting statistics. <INTERVAL> is interval between measurements in seconds. Time interval to average rates. Default value is 60 seconds. SEE ALSO lnstat(8) 27 June, 2007 RTACCT(8)
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