From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cassarossa.samfundet.no (cassarossa.samfundet.no [IPv6:2001:67c:29f4::29]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id AD71521F34E for ; Tue, 12 May 2015 16:13:35 -0700 (PDT) Received: from pannekake.samfundet.no ([2001:67c:29f4::50] ident=unknown) by cassarossa.samfundet.no with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1YsJMg-0007IL-Cd for bloat@lists.bufferbloat.net; Wed, 13 May 2015 01:13:30 +0200 Received: from sesse by pannekake.samfundet.no with local (Exim 4.84) (envelope-from ) id 1YsJMg-0009Tz-7P for bloat@lists.bufferbloat.net; Wed, 13 May 2015 01:13:30 +0200 Date: Wed, 13 May 2015 01:13:30 +0200 From: "Steinar H. Gunderson" To: bloat@lists.bufferbloat.net Message-ID: <20150512231330.GA30054@sesse.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Operating-System: Linux 3.18.4 on a x86_64 User-Agent: Mutt/1.5.23 (2014-03-12) Subject: Re: [Bloat] [Cerowrt-devel] better business bufferbloat monitoring tools? X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 May 2015 23:14:05 -0000 On Tue, May 12, 2015 at 03:17:34PM -0700, David Lang wrote: > I always set my graphs for 1 min samples (and am very tempted to go shorter) > just because 5 min hides so much. Just be aware that there are many devices (in particular switches) that only update SNMP counters now and then (say, every 17th second or whatever).[1] The shorter your polling interval, the greater your noise will be from that effect. [1] This used to be especially great in combination with devices that were too stupid to have 64-bit SNMP counters, but were fast enough to have 32-bit counters wraparound in 35 seconds or less. /* Steinar */ -- Homepage: http://www.sesse.net/