From owner-freebsd-stable@FreeBSD.ORG Wed Jan 2 16:11:52 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CFF9916A46C for ; Wed, 2 Jan 2008 16:11:52 +0000 (UTC) (envelope-from krassi@bulinfo.net) Received: from mx.bulinfo.net (mx.bulinfo.net [193.194.156.1]) by mx1.freebsd.org (Postfix) with ESMTP id 4C58713C47E for ; Wed, 2 Jan 2008 16:11:52 +0000 (UTC) (envelope-from krassi@bulinfo.net) Received: from localhost (localhost [127.0.0.1]) by mx.bulinfo.net (Postfix) with ESMTP id 92F2F157F9; Wed, 2 Jan 2008 18:11:50 +0200 (EET) Received: from mx.bulinfo.net ([127.0.0.1]) by localhost (mx.bulinfo.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 17388-08-2; Wed, 2 Jan 2008 18:11:46 +0200 (EET) Received: from [192.168.2.188] (pythia.bulinfo.net [212.72.195.5]) by mx.bulinfo.net (Postfix) with ESMTP id 70695157F2; Wed, 2 Jan 2008 18:11:46 +0200 (EET) Message-ID: <477BB7C0.3060603@bulinfo.net> Date: Wed, 02 Jan 2008 18:11:44 +0200 From: Krassimir Slavchev User-Agent: Thunderbird 2.0.0.9 (X11/20071122) MIME-Version: 1.0 To: Kris Kennaway References: <476A5EE1.9000003@bulinfo.net> <476FF662.6050604@FreeBSD.org> In-Reply-To: <476FF662.6050604@FreeBSD.org> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Virus-Scanned: amavisd-new at mx.bulinfo.net Cc: FreeBSD Subject: Re: Performance! X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 Jan 2008 16:11:53 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Kris Kennaway wrote: > Krassimir Slavchev wrote: > Hello, > > I have read all related threads about performance problems with multi > core systems but still have no idea what to do to make thinks better. > Below are results of testing postgresql on HP DL380G5 using sysbench. > The results are comparable to: > http://blog.insidesystems.net/articles/2007/04/11/postgresql-scaling-on-6-2-and-7-0 > > but the same tests running on the same hardware using Linux (kernel > 2.6.18-53.1.4.el5 SMP x86_64) are very different. > PostgreSQL is tuned equal. > > dmesg: > ... > CPU: Intel(R) Xeon(R) CPU X5450 @ 3.00GHz (3000.02-MHz > K8-class CPU) > Origin = "GenuineIntel" Id = 0x10676 Stepping = 6 > > Features=0xbfebfbff > > > Features2=0xce3bd> > > AMD Features=0x20000800 > AMD Features2=0x1 > Cores per package: 4 > usable memory = 8575655936 (8178 MB) > avail memory = 8288337920 (7904 MB) > ACPI APIC Table: > FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs > ... > > test: > sysbench --num-threads=${i} --test=oltp --pgsql-user=bench > --pgsql-db=bench --db-driver=pgsql --max-time=60 --max-requests=0 > --oltp-read-only=on run > > tuning: > kern.ipc.shmmax=2147483647 > kern.ipc.shmall=524288 > kern.ipc.semmsl=512 > kern.ipc.semmap=256 > kern.ipc.somaxconn=2048 > kern.maxfiles=65536 > vfs.read_max=32 > > kern.ipc.semmni=256 > kern.ipc.semmns=2048 > > results: > FreeBSD 7.0-BETA4 amd64 (cvsup on 20.12) GENERIC with SCHED_ULE > #threads #transactions/sec user/system > 1 500 7.4%,5.3% > 5 1990 30.9%,23.4% > 10 2510 39.9%,35.0% > 20 2549 44.5%,43.5% > 40 1921 29.8%,59.4% > 60 1580 22.7%,70.6% > 80 1341 18.9%,75.9% > 100 1227 16.5%,79.3% > > Linux > #threads #transactions/sec > 1 693 > 5 3539 > 10 5789 > 20 5791 > 40 5661 > 60 5517 > 80 5401 > 100 5319 > > > What can be done to improve these results? > > Best Regards > _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >> . >> > postgresql has some poor default settings on FreeBSD. You need to add: > stats_command_string = off > update_process_title = off > Kris I use a copy of postgresql.conf file from linux. Only 'stats_command_string = on' was commented. Here are results with these settings and lock_manager patch: #threads #transactions/sec 1 582 5 2154 10 2253 20 2705 40 2215 60 1713 80 1574 100 1256 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFHe7fAxJBWvpalMpkRAipaAJ4uNYByfRxOnPFf4HwG4MqV/zFDIACcC3Pj W8uGwpdL0oBG0OKHJ/4b/PQ= =1jGZ -----END PGP SIGNATURE-----