Date: Sat, 31 Aug 1996 09:24:42 -0500 (EST) From: "John S. Dyson" <toor@dyson.iquest.net> To: dwhite@resnet.uoregon.edu Cc: scott@statsci.com, Eric.Berenguier@sycomore.fr, questions@FreeBSD.ORG Subject: Re: FreeBSD 2.1.0 CRASH! Message-ID: <199608311424.JAA00453@dyson.iquest.net> In-Reply-To: <Pine.BSI.3.94.960830223422.267M-100000@gdi.uoregon.edu> from "Doug White" at Aug 30, 96 10:36:44 pm
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> On Thu, 29 Aug 1996, Scott Blachowicz wrote: > > > The size of the recommendation should change depending on whether or not > > the swap area is the total virtual address space or just an extension of > > the RAM (i.e. > > > > sizeof(virtual addr space) == sizeof(RAM)+ sizeof(swap) > > > > instead of just > > > > sizeof(virtual addr space) == sizeof(swap) > > FreeBSD uses method #1. It's all the same to the VM system. > Actually, it is somewhere in between, but over time, with lots of paging, you can only rely on #2. The issue is that we don't very often free swap space as pages are paged in. You really don't want to anyway because it will mostly fragment swap space. Disk is very very cheap anymore. John
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