Date: Thu, 12 Oct 2006 16:53:42 -0400 From: Kris Kennaway <kris@obsecurity.org> To: freebsd-performance@FreeBSD.ORG Subject: Re: Help with improving mysql performance on 6.2PRE Message-ID: <20061012205342.GA62241@xor.obsecurity.org> In-Reply-To: <200610120925.k9C9PmUK048690@lurza.secnetix.de> References: <3731.71.56.92.181.1160009571.squirrel@www.stelesys.com> <200610120925.k9C9PmUK048690@lurza.secnetix.de>
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--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--
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