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From Justin Erenkrantz <>
Subject Re: Puzzling News
Date Tue, 01 Mar 2005 00:05:16 GMT
--On Monday, February 28, 2005 6:24 PM -0500 Jeffrey Burgoyne 
<> wrote:

> I can go even one step further. 255 servers, 2.5 Gig of ram, huge config
> (200 virtuals hosts, 1500 redirect rules, 2000 rewrite rules, 300 proxy
> rules) and I never go into swap using prefork.

I believe 255 concurrent clients is really low now-a-days for high-end 
production servers.  Heck, 2.x's hard limit is 200,000 not 256.  (Reason 
#1001 why 2.x is better than 1.3.)  =)

It's when you start to get into several thousand concurrent connections 
that I've found that the memory model of prefork starts to get painful. 
And memory usage also depends on whether your OS does optimistic or 
pessimistic memory allocation.  It's impossible to run high MaxClients with 
prefork on, say, Solaris without having large amounts of swap dedicated. 
-- justin

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