Date: Sat, 11 Jun 2005 13:01:54 +0800 From: Xin LI <delphij@frontfree.net> To: Greg 'groggy' Lehey <grog@FreeBSD.org> Cc: Steve Roome <steve@lonres.com>, freebsd-stable@freebsd.org Subject: Re: FreeBSD MySQL still WAY slower than Linux Message-ID: <1118466114.695.3.camel@spirit> In-Reply-To: <20050611041947.GP87456@wantadilla.lemis.com> References: <746fd037f6ca8131a8fb8938f1e346e9@lonres.com> <20050610170537.GA67849@bibipentium.lonres.com> <20050611041947.GP87456@wantadilla.lemis.com>
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--=-n0NyXPbd60NofL7oXG5D Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi, Greg, =E5=9C=A8 2005-06-11=E5=85=AD=E7=9A=84 13:49 +0930=EF=BC=8CGreg 'groggy' Le= hey=E5=86=99=E9=81=93=EF=BC=9A > On Friday, 10 June 2005 at 18:05:37 +0100, Steve Roome wrote: > > We're using mostly: > > > > 5.4-STABLE FreeBSD 5.4-STABLE #0: Mon Jun 6 12:22:18 BST 2005 > > > > This is on a Dell PowerEdge 2850. (2 * 2.8 GHz Xeons, 4GB ram, disks), > > we've been keeping up with stable because supposedly all these new > > fixes to threading will help us out here. >=20 > What's the current malloc config for 5.4? Last time I saw this kind > of comparison, it proved to be due to malloc debugging. That was on > -CURRENT, though. See http://www.lemis.com/grog/diary-dec2004.html#14 > for more details. The malloc config for 5.4 is aj IIRC. Maybe we should do a gprof'ed build of mysql as well as ktrace dump of a mysql daemon to figure out what was happening? Actually the test team at my company has found the exact problem within a recent FreeBSD (5.4-R) vs CentOS (4.0) benchmark test, but they have not arranged the same hardware for me yet to figure out why. Cheers, --=20 Xin LI <delphij delphij net> http://www.delphij.net/ --=-n0NyXPbd60NofL7oXG5D Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQBCqnBC/cVsHxFZiIoRAh26AJ92pBHkcT+R/KHBhII2AlJoE0j53gCgi6d4 wHERZjOJfyqfB9zRtzFdsfo= =2mPX -----END PGP SIGNATURE----- --=-n0NyXPbd60NofL7oXG5D--
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