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From: Dylan Leigh <dleigh@cs.rmit.edu.au>
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Subject: Re: 6.x from i386 to amd64
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On Fri, Nov 03, 2006 at 07:33:31PM +1100, Peter Jeremy wrote:
> On Thu, 2006-Nov-02 11:12:43 -0800, David Marshall wrote:
> > More importantly for us, it's impossible to build a 32-bit
> > perl on the amd64, and we don't need a 64-bit perl.  Our
> > apache/mod_perl servers are 3X bigger on the amd64, and that
> > is unsatisfactory.
> 
> In most cases, an amd64 executable will be larger than an i386
> executable.  I'm surprised that you've found such a big
> difference.
> 

I also found a threefold increase in the memory footprint of
apache/mod_php/mod_perl when I switched from i386 to amd64. From
what I've read this isn't unheard of on 64 bit linux/apache/php.
Most other applications tend to be slightly larger on amd64.