Mailinglist Archive: opensuse (686 mails)

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Re: [opensuse] 64 bit vs 32 bit RAM consumption
  • From: Per Jessen <per@xxxxxxxxxxxx>
  • Date: Wed, 31 Jul 2013 14:35:46 +0200
  • Message-id: <ktb0bc$han$2@saturn.local.net>
John Andersen wrote:

On 7/23/2013 11:40 AM, Anton Aylward wrote:
If you have 4G of RAM or less the real question is 'why bother?'

The main advantage of 64-bit is the address space. For CAD, games
and such and massively multi-user servers where there is more than
64G of memory, yes 64-bit addressing counts.




Doesn't PAE play into this some how?
http://en.wikipedia.org/wiki/Physical_Address_Extension

My understanding is that PAE improvements allow 32bit code to handle
up to 6gig of memory and still closely match 64bit performance, and
under linux PAE support could handle up to 64gig of memory with a
32bit processor.

Yep. I have an elderly 32bit box with 48Gb memory, it works very well.
How much of a performance impact PAE really is, I don't know, but it
has not been an issue.



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Per Jessen, Zürich (24.5°C)
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