From owner-freebsd-questions@FreeBSD.ORG Tue Jul 1 08:49:15 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6C3AF1065686 for ; Tue, 1 Jul 2008 08:49:15 +0000 (UTC) (envelope-from kris@FreeBSD.org) Received: from weak.local (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 5FB5C8FC35; Tue, 1 Jul 2008 08:49:14 +0000 (UTC) (envelope-from kris@FreeBSD.org) Message-ID: <4869EF87.4040707@FreeBSD.org> Date: Tue, 01 Jul 2008 10:49:11 +0200 From: Kris Kennaway User-Agent: Thunderbird 2.0.0.14 (Macintosh/20080421) MIME-Version: 1.0 To: ProAce References: <737a6d270806302225y4763ca70ge9dc5084847e05de@mail.gmail.com> In-Reply-To: <737a6d270806302225y4763ca70ge9dc5084847e05de@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: Is it reliable to increase the MAXCPU in param.h ? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Jul 2008 08:49:15 -0000 ProAce wrote: > Server: HP DL785G5 with 8 CPU ( 32 cores ) , 16G RAM > OS: FreeBSD 7.0-amd64 > Kernel 1: MAXCPU = 16 ( default ) > Kernel 2: MAXCPU = 32 > > DL785G5 run with kernel 1 and kernel 2 both successfully, and the > FreeBSD can detect the 16 CPUs and 32 CPUs normally ( using top -S > command). > > If I use kernel 2 for postgresql 8.3, is it reliable and stable? 32 should be OK, but we haven't had access to such a machine yet (we briefly had access to a 16-core system but it melted) so we have not yet tuned for performance on it. FreeBSD 8.0 will run better if you are willing to use a development version of FreeBSD. Kris