Date: Wed, 9 Jun 2004 14:36:52 -0400 From: Bill Moran <wmoran@potentialtech.com> To: Randy Pratt <rpratt1950@earthlink.net> Cc: y2kbug@ms25.hinet.net Subject: Re: Improper shutdown of system / Fragmentation Problems / Boot logs 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>
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Randy Pratt <rpratt1950@earthlink.net> wrote: > On Wed, 9 Jun 2004 07:05:43 +0800 > Robert Storey <y2kbug@ms25.hinet.net> 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
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