From owner-freebsd-questions Mon Mar 18 16:34: 6 2002 Delivered-To: freebsd-questions@freebsd.org Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80]) by hub.freebsd.org (Postfix) with ESMTP id B6BF237B405 for ; Mon, 18 Mar 2002 16:33:58 -0800 (PST) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id DA1897831F; Tue, 19 Mar 2002 11:03:56 +1030 (CST) Date: Tue, 19 Mar 2002 11:03:56 +1030 From: Greg 'groggy' Lehey To: Kenneth Culver Cc: Tony Vickers , freebsd-questions@FreeBSD.ORG Subject: Re: SMP Message-ID: <20020319110356.C91646@wantadilla.lemis.com> References: <20020318161110.S53554-100000@alpha.yumyumyum.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20020318161110.S53554-100000@alpha.yumyumyum.org> User-Agent: Mutt/1.3.23i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Monday, 18 March 2002 at 16:13:15 -0500, Kenneth Culver wrote: >> Can FreeBSD support more than one CPU? All the docs that I have found >> touch on the subject, but never really answer the question. I plan on >> moving from linux to FreeBSD on our database systems, however this >> question could make or break the out come. Thanks. > > Yes FreeBSD supports SMP, but it won't make much of a difference on a > FreeBSD 4.x machine for databases. Databases tend to have a lot of > processes trying to access the disk at once. This requires kernel service > and right now in 4.x FreeBSD can only have one processor running the > kernel at once. FreeBSD 5.0 (planned for release in November) will correct > this, and most likely be as fast as (if not faster than) anything out > there. We don't expect the initial release of 5.0 to bring significant performance improvements, though in the particular case of databases it might be a little faster than 4.x. It certainly won't perform as well as some commercial UNIX products, though. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply. For more information, see http://www.lemis.com/questions.html See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message