From owner-freebsd-hackers@FreeBSD.ORG Tue Aug 28 17:42:46 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 89F7D1065676 for ; Tue, 28 Aug 2012 17:42:46 +0000 (UTC) (envelope-from andrey@zonov.org) Received: from mail-lb0-f182.google.com (mail-lb0-f182.google.com [209.85.217.182]) by mx1.freebsd.org (Postfix) with ESMTP id 011F98FC18 for ; Tue, 28 Aug 2012 17:42:45 +0000 (UTC) Received: by lbbgg13 with SMTP id gg13so4054985lbb.13 for ; Tue, 28 Aug 2012 10:42:44 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-enigmail-version:content-type :x-gm-message-state; bh=R97cyN89ewvKJHugR03K8PwYsypThpT+fdUah2EzqVU=; b=IVWy/HBM5M1e4s7LafsXIwej1N2SmOQGM36S9ihnVmQAjAgGx4Y+q3i8du7r3Tv1jf KYSsVyo2CRg4CsHluFo+xdrhx9rhNG4bFZWh2fabmqLu0VEOkvZO8enLi40IZo2RcJMH LBCGb1a3NngO+4wdTdZXQZzAWRz1WJnG0kBnjEoIKfBCWfcu8/o8IzjkySOIpIreV7+F xqES2qJBIBN0UzCgByFkC7KgxndXtWACdyfcQgm1dCq99yz8lMQWO1cZhpPP1KFrZ3Q9 ozTJe/g1vaxzNY1HWTElG6X/OaTCugNE+e4W4vpI1zTrUksKQTrcpWwA+vGuO7dWMG9l +FPg== Received: by 10.152.132.233 with SMTP id ox9mr19165146lab.25.1346175763913; Tue, 28 Aug 2012 10:42:43 -0700 (PDT) Received: from zont-osx.local (ppp95-165-143-86.pppoe.spdop.ru. [95.165.143.86]) by mx.google.com with ESMTPS id nf5sm22697235lab.3.2012.08.28.10.42.42 (version=SSLv3 cipher=OTHER); Tue, 28 Aug 2012 10:42:43 -0700 (PDT) Sender: Andrey Zonov Message-ID: <503D0308.70109@FreeBSD.org> Date: Tue, 28 Aug 2012 21:42:32 +0400 From: Andrey Zonov User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:14.0) Gecko/20120713 Thunderbird/14.0 MIME-Version: 1.0 To: Andy Young References: In-Reply-To: X-Enigmail-Version: 1.4.3 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigCDF012FCB4FC78B4732FDA45" X-Gm-Message-State: ALoCoQnL1T6o/Gm+hxSlefPfsQ+4wCr/OfRnTsQRptje3zrOQdtpwnUjLQtSBECA8Rd2nOmOjPX9 Cc: freebsd-hackers@freebsd.org Subject: Re: Question on io monitoring tools such as gstat and iostat X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Aug 2012 17:42:46 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigCDF012FCB4FC78B4732FDA45 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 8/28/12 3:14 PM, Andy Young wrote: > I am relatively new to using IO monitoring tools and wanted to confirm = I > understand them correctly. If I specify an interval of 5 seconds, my > assumption is that the data displayed is an average over that 5 second > interval. Is that correct or am I misunderstanding how intervals work? >=20 Yes, you are right. For more information you can read devstat(3) or sources in src/lib/libdevstat/devstat.c. --=20 Andrey Zonov --------------enigCDF012FCB4FC78B4732FDA45 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.18 (Darwin) Comment: GPGTools - http://gpgtools.org iQEcBAEBAgAGBQJQPQMRAAoJEBWLemxX/CvTOEQH/0jAhryc1mc4ajJvDUFD6qly mz+Dh5CdzN6ete+y2FH04F528rc2/phKWKA+s1iTsOwkbO4I6zJ2LR1e4JHFTRhk D/jvrSE6CIglavx7zCCEAFLB5d+YQ17On1Ssj033zXsGl8ZLUxpdSZ27KAJ0GnL7 PY9gH8sJuBZyceWcw6XkiXBlsbqWxiUqq4eqVDJ4QLIx5wBztZ3YP4B5MEm4g+m4 tHBM+36GfGD8i8Knav11MSguSsm+4my2Mym3jXFBcLHgvYFr1iwYPgb/jVDnoAT8 ATzBEynGDnzESSo8AkKBQbnTbHbbYwb7k53VbxAEckzit3NuoFleoGlYds6FrCs= =wBcp -----END PGP SIGNATURE----- --------------enigCDF012FCB4FC78B4732FDA45--