From owner-freebsd-questions Thu Aug 10 9:39:40 2000 Delivered-To: freebsd-questions@freebsd.org Received: from cambridge1-smrly2.gtei.net (cambridge1-smrly2.gtei.net [199.94.215.244]) by hub.freebsd.org (Postfix) with ESMTP id 410D837B7C5 for ; Thu, 10 Aug 2000 09:39:37 -0700 (PDT) (envelope-from AndrewGould@shannonhealth.org) Received: from istech4.shannonhealth.org (istech4.shannonhealth.org [4.18.79.4]) by cambridge1-smrly2.gtei.net (Postfix) with ESMTP id 0E8021DCBF for ; Thu, 10 Aug 2000 16:39:28 +0000 (GMT) Received: by ISTECH4 with Internet Mail Service (5.5.2650.21) id ; Thu, 10 Aug 2000 11:46:53 -0500 Message-ID: <206499C84775D3119A000000F879310E011276C6@ISTECH4> From: Andrew Gould To: "'questions@FreeBSD.org'" Subject: RE: Kernel compiling questions Date: Thu, 10 Aug 2000 11:46:52 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Thanks, this was just the info I was looking for. > ---------- > From: Erik Trulsson[SMTP:ertr1013@student.uu.se] > Sent: Thursday, August 10, 2000 11:30 AM > To: Andrew Gould > Cc: 'questions@FreeBSD.org' > Subject: Re: Kernel compiling questions > > On Thu, Aug 10, 2000 at 09:06:05AM -0500, Andrew Gould wrote: > > Hi all, > > > > I'm considering recompiling the kernel in a FreeBSD 4.0 system; and I > have a > > few question: > > > > 1. My system has an Athlon 700Mhz chip, 384Mb RAM, 1Gb swap and no > pcmcia > > devices. I will be running a database server using MySQL. If I just > want > > to specify the cpu type and remove pcmcia support, will the improved > > performance be worth the effort? (I want to keep scsi support for > future > > flexibility.) > > Probably not. Main reasons for recompiling a kernel are: > * Reduce memory usage by removing support for hardware you don't have. In > > your case you have enough memory that the difference wouldn't be > noticable. > * Add support for devices that weren't in GENERIC (like soundcards). > * Upgrading to a later version > > None of these seem to apply in your case. > > > > > 2. Was the kernel that is initially installed with FreeBSD 4.0 > configured > > using the GENERIC configuration file? In other words, if I recompile > using > > a copy of GENERIC without adding options/devices, will I lose support > for > > things I didn't comment out? > > The kernel that is initially installed is configured from the GENERIC > file. > So if you compile a new kernel from that file without doing any > modifications you should end up with no change in behaviour. > > > > -- > > Erik Trulsson > ertr1013@student.uu.se > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message