Date: Wed, 15 Aug 2001 07:23:00 -0500 From: Mike Meyer <mwm@mired.org> To: jerry@thehutt.org Cc: Mark Ibell <marki@paradise.net.nz>, freebsd-stable@freebsd.org Subject: Re: MFS Sizing Problems Message-ID: <15226.27044.969408.568733@guru.mired.org> In-Reply-To: <20010815074241.A12511@gemini.thehutt.org> References: <20010814135213.A64512@gemini.thehutt.org> <3B7A214B.FD6F34F6@paradise.net.nz> <20010815074241.A12511@gemini.thehutt.org>
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Jerry A! <jerry@thehutt.org> types: > On Wed, Aug 15, 2001 at 07:14:19PM +1200, Mark Ibell wrote: > : > 2. Undaunted, I decided to use the 500M for right now, realizing that > : > when I compiled X it would end up having to swap to disk. However, that > : > never happened. The 500m in /tmp filled up, but never swapped any of > : > itself out to disk. > And this issue is the one that is really getting me. I thought that the > entire purpose of the swap-based backing store was for MFS to dump it's > contents. Am I misunderstanding this correctly? Yes, you have correctly misunderstood this. Being backed by swap means that the data in the memory blocks it's using can be written to swap if the system decides there's something better to do with that real memory - just like anything else that's backed by swap. If you then need that data again, it'll be read back in from swap so you can use it. Under no circumstances will you be able to get more than the 500m you allocated for it. <mike -- Mike Meyer <mwm@mired.org> http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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