From owner-freebsd-performance@FreeBSD.ORG Wed Jan 30 10:36:55 2008 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B65A616A417 for ; Wed, 30 Jan 2008 10:36:55 +0000 (UTC) (envelope-from gofp-freebsd-performance@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id 34C5213C44B for ; Wed, 30 Jan 2008 10:36:54 +0000 (UTC) (envelope-from gofp-freebsd-performance@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1JKAJF-0001FB-6T for freebsd-performance@freebsd.org; Wed, 30 Jan 2008 10:36:49 +0000 Received: from lara.cc.fer.hr ([161.53.72.113]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 30 Jan 2008 10:36:49 +0000 Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 30 Jan 2008 10:36:49 +0000 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-performance@freebsd.org From: Ivan Voras Date: Wed, 30 Jan 2008 11:37:18 +0100 Lines: 34 Message-ID: References: <200801281024.11571.darcyb@commandprompt.com> <479E3C5E.1070405@FreeBSD.org> <47A043FD.9090607@FreeBSD.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig4A11114D49D2C50E78B1F06C" X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr User-Agent: Thunderbird 2.0.0.6 (X11/20071022) In-Reply-To: <47A043FD.9090607@FreeBSD.org> X-Enigmail-Version: 0.95.0 Sender: news Subject: Re: postgresql-performance using sysbench 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: Wed, 30 Jan 2008 10:36:55 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig4A11114D49D2C50E78B1F06C Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Kris Kennaway wrote: > Write performance is something that we are working on, expect to hear > about progress over the coming weeks/months. Do you have some notes or descriptions about what is being worked on? I'm currently doing some file system benchmarking for internal purposes and I'm seeing sequential read/write performance nontrivially lower on FreeBSD+UFS than on Linux+ext3. The Linux combination has ~~20% faster writes and ~~60% faster reads, on a hardware RAID10 of four 15kRPM drives, IBM ServeRAID 8 (file system ops / nonsequential are worse - send me a private message for details). Is the work that's been going on about lock contention or something at the low levels of the file system? --------------enig4A11114D49D2C50E78B1F06C Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHoFNeldnAQVacBcgRAnJWAKD4FLYqJkeK64S70JeLR5KT7qhMaACg0cbv YdtnStR6Iy4wDtWUH8YP6M4= =t/Wk -----END PGP SIGNATURE----- --------------enig4A11114D49D2C50E78B1F06C--