From owner-freebsd-questions@FreeBSD.ORG Wed Jun 9 18:37:07 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 252E916A4CE for ; Wed, 9 Jun 2004 18:37:07 +0000 (GMT) Received: from internet.potentialtech.com (h-66-167-251-6.phlapafg.covad.net [66.167.251.6]) by mx1.FreeBSD.org (Postfix) with ESMTP id E5D3643D46 for ; Wed, 9 Jun 2004 18:37:04 +0000 (GMT) (envelope-from wmoran@potentialtech.com) Received: from working.potentialtech.com (pa-plum1c-102.pit.adelphia.net [24.53.179.102]) by internet.potentialtech.com (Postfix) with ESMTP id A827069A7E; Wed, 9 Jun 2004 14:36:53 -0400 (EDT) Date: Wed, 9 Jun 2004 14:36:52 -0400 From: Bill Moran To: Randy Pratt Message-Id: <20040609143652.1eaf6861.wmoran@potentialtech.com> In-Reply-To: <20040609142552.52087a65.rpratt1950@earthlink.net> References: <1086674510.1106.4.camel@solid.solisixoffice.com> <200406081436.i58Eaa704784@clunix.cl.msu.edu> <20040609070543.470a7e75.y2kbug@ms25.hinet.net> <20040609142552.52087a65.rpratt1950@earthlink.net> Organization: Potential Technologies X-Mailer: Sylpheed version 0.9.10 (GTK+ 1.2.10; i386-portbld-freebsd4.9) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit cc: freebsd-questions@freebsd.org cc: y2kbug@ms25.hinet.net Subject: Re: Improper shutdown of system / Fragmentation Problems / Boot logs X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jun 2004 18:37:07 -0000 Randy Pratt wrote: > On Wed, 9 Jun 2004 07:05:43 +0800 > Robert Storey wrote: > > > > > > I am kinda new to FBSD, still kinda learning stuff. Anyway, when my > > > system boots i see all kinda fragmentation information. How do I > > > correct this? Any good reading material? > > > > FreeBSD will defragment itself without any action from the user. > > However, defragmentation requires some blank space, and (ideally) you > > should not let any partition get more than 80% full. You can check on > > that with "df -h": > > I've been running partitions well over 90% for over six years on > FreeBSD and have not seen any problems with doing so. > > Do you have a FreeBSD documentation reference for that 80% figure? man tunefs See, in particular, the section on the -m option, which describes (in brief) the known performance problems and how FreeBSD reacts. Robert's numbers aren't quite right. The point at which performance starts to suck is 90% full. You won't have any _problems_, it's just that performance will degrade, according to the man page, up to 3x slower. -- Bill Moran Potential Technologies http://www.potentialtech.com