From owner-freebsd-questions@FreeBSD.ORG Fri Aug 17 22:23:31 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0940016A474 for ; Fri, 17 Aug 2007 22:23:31 +0000 (UTC) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.freebsd.org (Postfix) with ESMTP id E237213C4E1 for ; Fri, 17 Aug 2007 22:23:30 +0000 (UTC) (envelope-from kris@obsecurity.org) Received: from rot26.obsecurity.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id 5769E1A3C1A; Fri, 17 Aug 2007 15:21:53 -0700 (PDT) Received: by rot26.obsecurity.org (Postfix, from userid 1001) id EC74BC3AE; Fri, 17 Aug 2007 18:23:29 -0400 (EDT) Date: Fri, 17 Aug 2007 18:23:29 -0400 From: Kris Kennaway To: Mark Messier Message-ID: <20070817222329.GA32638@rot26.obsecurity.org> References: <4B90A9A7-D8D6-49C5-B097-00094486EF4A@messier.com> <17838240D9A5544AAA5FF95F8D52031602504E94@ad-exh01.adhost.lan> <289E327A-ED2B-4099-AAFF-8CF0FFE7C572@messier.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="mP3DRpeJDSE+ciuQ" Content-Disposition: inline In-Reply-To: <289E327A-ED2B-4099-AAFF-8CF0FFE7C572@messier.com> User-Agent: Mutt/1.4.2.3i Cc: "Michael K. Smith - Adhost" , FreeBSD Mailing List Subject: Re: performance hints (6.2) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 17 Aug 2007 22:23:31 -0000 --mP3DRpeJDSE+ciuQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Aug 17, 2007 at 01:35:48PM -0700, Mark Messier wrote: > >> What does a gstat look like over time? >=20 > Oooh, didn't know about gstat.... it shows disks as being 102% busy =20 > at times :-) gstat's "busy" statistic is entirely meaningless for this context (rather, it has a meaning but it's not what you think it is). Instead you should be looking at the number of transactions/second and the average time/transaction. This tells how long processes are waiting before the disk controller can service the I/O, and you should compare those numbers to your performance requirements or your expectations from the hardware. Your data showed your CPU doing almost no work, so I/O is definitely your problem though. Kris --mP3DRpeJDSE+ciuQ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFGxh/hWry0BWjoQKURAjeMAKDI1jjVsibN8f8TYKVQJ1vYNjAvRQCeL7qi am5YvKjIlNev0CQS+LZFIvA= =YiL3 -----END PGP SIGNATURE----- --mP3DRpeJDSE+ciuQ--