Date: Wed, 11 Jan 2012 14:57:08 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@freebsd.org Subject: Re: Network throughput Message-ID: <4F0DA344.9030504@infracaninophile.co.uk> In-Reply-To: <4F0D7B87.9060808@zzz.ee> References: <20120111112400.Horde.g4QFfgcXel9PDXFQSwJwfrA@webmail.geofront.co.uk> <4F0D7B87.9060808@zzz.ee>
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On 11/01/2012 12:07, Ott K=F6stner wrote:
> On 11.01.2012 13:24, Mike Woods wrote:
>> >
>> > I'm trying to gather network throughput information on a box of ours=
>> > and I'm having a little problem, the throughput is to be measured on=
a
>> > per-minute basis and i've been trying to use netstat for this (count=
>> > now - count before/timeperiod) however netstats byte counter resets
>> > far too quickly to be usefull (this is a busy gb link), i've had a
>> > look at vnstat but this only seems to operation on an hour or higher=
>> > and I need to get down to the minute, does anyone have any suggestio=
ns
>> > of a tool better suited to this ?
> I have been using net-snmp daemon in combination with mrtg. Displays
> nice traffic graphs.
Yes -- mrtg is nice, but it relies on the snmp interface counters, and
in this case with Gb traffic levels a 32bit counter will wrap in a few
minutes. mrtg samples the interface counter every 5 minutes IIRC, so
would probably be confused by that wrap-around happening at around the
same frequency.
Unless you switch to using 64bit interface counters, but I don't know if
mrtg can cope with integer types that wide...
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matthew@infracaninophile.co.uk Kent, CT11 9PW
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