From owner-freebsd-performance@FreeBSD.ORG Thu Oct 12 20:53:43 2006 Return-Path: X-Original-To: freebsd-performance@FreeBSD.ORG Delivered-To: freebsd-performance@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 56E3B16A47C for ; Thu, 12 Oct 2006 20:53:43 +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 1590243D53 for ; Thu, 12 Oct 2006 20:53:43 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id F1CEC1A3C1C for ; Thu, 12 Oct 2006 13:53:42 -0700 (PDT) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 6357B51398; Thu, 12 Oct 2006 16:53:42 -0400 (EDT) Date: Thu, 12 Oct 2006 16:53:42 -0400 From: Kris Kennaway To: freebsd-performance@FreeBSD.ORG Message-ID: <20061012205342.GA62241@xor.obsecurity.org> References: <3731.71.56.92.181.1160009571.squirrel@www.stelesys.com> <200610120925.k9C9PmUK048690@lurza.secnetix.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="qMm9M+Fa2AknHoGS" Content-Disposition: inline In-Reply-To: <200610120925.k9C9PmUK048690@lurza.secnetix.de> User-Agent: Mutt/1.4.2.2i Cc: Subject: Re: Help with improving mysql performance on 6.2PRE X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Oct 2006 20:53:43 -0000 --qMm9M+Fa2AknHoGS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Oct 12, 2006 at 11:25:48AM +0200, Oliver Fromme wrote: > Jerry Bell wrote: > > I have a Dell PE2950 with 2 dual core 3.73Ghz processors and 4G of ram. > > [...] > > changed the clock to TSC >=20 > As far as I know, it is unsafe to use TSC on SMP systems. >=20 > Or did that change recently? It's only on certain systems, apparently. Note that you have to enable a second sysctl to allow it to actually use TSC on SMP, not just change the preferred timecounter. Kris --qMm9M+Fa2AknHoGS Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFLqtVWry0BWjoQKURArCBAJ9WlW5bLJDX/uACcgi7XlFc2LxkvQCfTd7E TxilP8bAE5YCPEDZMWG8ISs= =AT4k -----END PGP SIGNATURE----- --qMm9M+Fa2AknHoGS--