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From: Jonathan Vanasco <jvanasco@2xlp.com>
Subject: Re: mod_perl implementation possibility
Date: Fri, 16 Mar 2007 12:10:01 -0400
To: James.L <perlwle@yahoo.com>


On Mar 16, 2007, at 11:55 AM, James. L wrote:

> any special setup for mod_perl 1 + apache 1 under
> virtual host? it works but my impression is that it is
> hard to setup and must be coded very carefully.
>
> that's probably the reason why i rarely see mod_perl
> offered in share dhosting environment.

no, mod_perl is just unsuitable for shared hosting by design.  it has  
nothing to do with virtual hosts.

	a- mp caches code into apache.   it can take *a lot* of ram.   
there's no effective way to manage memory in these situations -- you  
either preload everyone's stuff into apache at start, or apache takes  
a performance hit each time a child reads code for the first time.   
because apache children expire after x requests, in a shared  
environment you'll get almost no speedup - and a potential  
performance decrease.
	b- as clinton noted previously, the way mod_perl handles namespaces  
can cause overlap issues

As I said before, you're best off to just install apache2 and mp2 *in  
addition to apache1*. you can keep all your apache1 stuff running as- 
is on port 80.  just run/configure apache2/mp2 to run on an alternate  
port - like 8080 , and proxy the necessary requests to it via  
mod_proxy on 80.


// Jonathan Vanasco

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