From owner-freebsd-hackers Mon Jul 21 10:41:52 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id KAA27615 for hackers-outgoing; Mon, 21 Jul 1997 10:41:52 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id KAA27607 for ; Mon, 21 Jul 1997 10:41:49 -0700 (PDT) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.5/8.7.3) id DAA24563; Tue, 22 Jul 1997 03:11:38 +0930 (CST) From: Michael Smith Message-Id: <199707211741.DAA24563@genesis.atrad.adelaide.edu.au> Subject: Re: File systems slowness? In-Reply-To: from Alfred Perlstein at "Jul 3, 97 12:51:45 pm" To: brightmn@a-v25.rh.sunyit.edu (Alfred Perlstein) Date: Tue, 22 Jul 1997 03:11:38 +0930 (CST) Cc: hackers@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Alfred Perlstein stands accused of saying: > > My system is a 586/133 with 64megs of ram, the motherboard supports mode 4 > PIO and mode 2 DMA, i know there are a lot of files in that directory, but > isn't that a little excessive? I assume the disk was going crazy going > back and forth from inode space to data space on the disk... but with 64 > megs of ram i thought it would try some caching perhaps? It does. What you are seeing are synchronous metadata updates. > doesn't freebsd have write-behind caching? or does it need to be enabled > seperately? Mount the filesystem with the 'async' option. This is less conservative than the default, which seeks to maximise reliabilty by trading off speed. > Alfred Perlstein -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[