Date: Wed, 30 Jan 2008 11:37:18 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-performance@freebsd.org Subject: Re: postgresql-performance using sysbench Message-ID: <fnpjvo$n8i$1@ger.gmane.org> In-Reply-To: <47A043FD.9090607@FreeBSD.org> References: <b41c75520801280701x35e628dk90841b55cac77045@mail.gmail.com> <fnl35p$hnj$1@ger.gmane.org> <200801281024.11571.darcyb@commandprompt.com> <b41c75520801281221i5fbb32f3p1e2f3be40a8dfa74@mail.gmail.com> <479E3C5E.1070405@FreeBSD.org> <b41c75520801281246q16d305ecue915e66bea6ac5ab@mail.gmail.com> <fnmrri$pi4$1@ger.gmane.org> <b41c75520801290146g4e6e2c17oe2fc432245253ba7@mail.gmail.com> <47A043FD.9090607@FreeBSD.org>
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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--
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