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List:       apache-modperl
Subject:    Re: go crazy with me
From:       Ask_Bjørn_Hansen <ask () develooper ! com>
Date:       2005-12-25 19:28:58
Message-ID: 3A2D850A-5F11-4B27-A5F2-CDD7C357178E () develooper ! com
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On Dec 21, 2005, at 12:10 PM, Randal L. Schwartz wrote:

>>>>>> "Fred" == Fred Moyer <fred@taperfriendlymusic.org> writes:
>
> Fred> Can you explain a bit more why using keep-alives to the  
> backend is not
> Fred> a good thing?  I've always been under the impression from  
> conference
> Fred> lectures and literature that turning keep-alives on for the  
> app server
> Fred> is something you should do to reduce the overhead of creating  
> new tcp
> Fred> connections to the proxy server.
>
> Imagine wanting to have 50 fronts and 10 backs.  If you use keep  
> alives,
> that'll end up being 50 fronts and 50 backs.

Some proxies/load balancers can keep 50 frontend connections open  
over 10 backend connections, all with keep-alives by using one  
backend connection for multiple frontend connections.

(perlbal is one of them)


   - ask

-- 
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