From owner-freebsd-hackers Sun Mar 31 12:52:24 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id MAA27040 for hackers-outgoing; Sun, 31 Mar 1996 12:52:24 -0800 (PST) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id MAA27034 for ; Sun, 31 Mar 1996 12:52:21 -0800 (PST) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id WAA17380 for ; Sun, 31 Mar 1996 22:52:16 +0200 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id WAA27340 for freebsd-hackers@freebsd.org; Sun, 31 Mar 1996 22:52:16 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.7.4/8.6.9) id WAA00828 for freebsd-hackers@freebsd.org; Sun, 31 Mar 1996 22:34:12 +0200 (MET DST) From: J Wunsch Message-Id: <199603312034.WAA00828@uriah.heep.sax.de> Subject: Re: Lowering minfree to 1% on large disks To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Sun, 31 Mar 1996 22:34:11 +0200 (MET DST) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: from "Brian Tao" at Mar 31, 96 01:49:15 pm X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL24 ME8a] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As Brian Tao wrote: > I know the tunefs man page contains warnings about lowering the > minfree threshold on a disk to below 5%, but besides file write > performance, is there any other reason *not* to drop it down to 1 or > 2 percent? File *write* performance? I think it's the overall file system performance. Read the daemon book... Perhaps for a rather static file system, where you're keeping the fragmentation low by restore(8)ing the file system frequently after modifications, it might be okay, or for file systems that are only rarely used at all. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)