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From: Darren Pilgrim <darren.pilgrim@bitfreak.org>
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To: Francisco Reyes <lists@stringsutils.com>
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Cc: freebsd-chat@FreeBSD.ORG
Subject: Re: What ever happened to Terasolutions?
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Francisco Reyes wrote:
> Oliver Fromme writes:
> 
>> (In other words:  PAE might enable you to use RAM >= 4 GB,
>> but your processes will still be limited to 32bit address
>> space.)
> 
> Thanks for the pointer.
> That is a good reason to go AMD64 if one has apps which will require 
> lots of RAM, although I can't think of any program I use ever needing 
> 4GB+ for a single program.

PostgreSQL uses shared buffers.  The address space for each server 
process could easily exceed 4 GB unless SYSVSHM is a special case.