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Date:      Fri, 13 Jul 2001 13:48:57 -0700 (PDT)
From:      Julian Elischer <julian@elischer.org>
To:        Leo Bicknell <bicknell@ufp.org>
Cc:        Matt Dillon <dillon@earth.backplane.com>, Drew Eckhardt <drew@PoohSticks.ORG>, hackers@FreeBSD.ORG
Subject:   Re: Network performance tuning.
Message-ID:  <Pine.BSF.4.21.0107131348010.70202-100000@InterJet.elischer.org>
In-Reply-To: <20010713145135.A26818@ussenterprise.ufp.org>

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terry is servicing 1,000,000 connections..
so I'm sure the savings are real to him...


Julian

On Fri, 13 Jul 2001, Leo Bicknell wrote:

> On Fri, Jul 13, 2001 at 11:47:19AM -0700, Matt Dillon wrote:
> >     Well, you'd be surprised.  90% of the world still uses modems, so
> >     from the point of view of a web server it would be a big win.  The
> 
> Doesn't that sort of make my point though?  With the current defaults of
> 16k/socket there is no trouble filling modems, and no one seems worried
> about the amount of memory that uses (basically all the installed machines
> out there are running just fine).
> 
> So, if we leave a hard minimum of 16k/socket, just chalk that up to waste,
> and call it good enough we only have to handle the 10% of the world using
> more.
> 
> It would be nice to have the code to scale down 100 modem users to 8k, rather
> than 16k, but that's still only 800k of memory recovery (for 100 simultaneous
> connections), and we're talking about the ability to support streams that
> need up to 1M per stream of buffer, so 800k seems "interesting" but not
> "important".
> 
> Better would probably be to lower the default to 8k, more than enough for
> modem users, and let the scale up code hit the few 16k people.
> 
> *shrug*
> 
> -- 
> Leo Bicknell - bicknell@ufp.org
> Systems Engineer - Internetworking Engineer - CCIE 3440
> Read TMBG List - tmbg-list-request@tmbg.org, www.tmbg.org
> 
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