Date: Tue, 22 Jul 1997 03:11:38 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: brightmn@a-v25.rh.sunyit.edu (Alfred Perlstein) Cc: hackers@FreeBSD.ORG Subject: Re: File systems slowness? Message-ID: <199707211741.DAA24563@genesis.atrad.adelaide.edu.au> In-Reply-To: <Pine.BSF.3.96.970703124751.9923D-100000@server.local.sunyit.edu> from Alfred Perlstein at "Jul 3, 97 12:51:45 pm"
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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 [[
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