Date: Tue, 08 Oct 2002 08:41:19 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: "Vladimir B. Grebenschikov" <vova@sw.ru>, Mikhail Teterin <mi+mx@aldan.algebra.com>, arch@FreeBSD.org Subject: Re: using mem above 4Gb was: swapon some regular file Message-ID: <3DA2FC9F.22C66877@mindspring.com> References: <200210071630.42512.mi%2Bmx@aldan.algebra.com> <1034074876.917.23.camel@vbook.express.ru> <3DA2F716.C5B69C7C@mindspring.com>
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Terry Lambert wrote: > So whatever connections you are getting now... halve that, or less, > to get a window for your RAM disk (you will need KVA for mappings > for all the memory that *can* be in the window, etc.). To emphasize this: if you are using 4K pages, you will need: 4K/1M * 64G = 256M ...1/4 of 1G of memory outside the window, just for page tables. Also, if we still were using an mbuf per connection for the template, for 1,000,000 connections, that's 256M of RAM -- another 1/4 gig. Yeah, most people don't think in these terms; personally, I like to call it "Extreme BSD". 8-). -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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