Date: Sun, 14 Apr 1996 20:22:16 -0500 (EST) From: "John S. Dyson" <toor@dyson.iquest.net> To: davidg@Root.COM Cc: dyson@FreeBSD.org, andreas@knobel.gun.de, joerg_wunsch@uriah.heep.sax.de, groudier@iplus.fr, hackers@FreeBSD.org, linux-kernel@vger.rutgers.edu Subject: Re: Unices are created equal, but ... Message-ID: <199604150122.UAA00309@dyson.iquest.net> In-Reply-To: <199604142355.QAA04357@Root.COM> from "David Greenman" at Apr 14, 96 04:55:34 pm
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> >systems!!! The AT&T GIS/NCR/Tandem boxes really acted badly when users > >would tune the system to allow too much memory to be dirty filesystem > >cache buffers. I could be convinced that 1/4 of memory for dirty buffers > >is okay, and in some cases even more could be considered. But those cases > >where a system could gain significantly from huge write caches are few > >and far between. I guess if managed VERY WELL, a large (>1/2 mem) write cache > >would be good -- I just haven't seen that yet. > > Worst case, that would be about 256MB of cached data to write out on > wcarchive. :-) I think I prefer the current scheme. :-) > > -DG > That is the point -- those boxes did have 256MBytes!!! Imagine what sync did to the systems!!! John
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