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July 2014

SCIENTIFIC-LINUX-USERS@LISTSERV.FNAL.GOV

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Subject:
From:
Nico Kadel-Garcia <[log in to unmask]>
Reply To:
Nico Kadel-Garcia <[log in to unmask]>
Date:
Wed, 9 Jul 2014 02:48:51 -0400
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On Tue, Jul 8, 2014 at 3:12 PM, Brett Viren <[log in to unmask]> wrote:
> Yasha Karant <[log in to unmask]> writes:
>
>> how much additional RAM and hard drive space is required by this
>> X86-64 implementation?
>
> The memory usage going from 32 to 64bit x86 really depends on the code
> you run.  My understanding is it boils down to how much of the job's
> memory is made up of pointers as compared to other data types that are
> invariant under this bit change.  This can vary a lot and of course it
> matters what the absolute memory usage is to begin with.  If you are
> concerned you should benchmark your actual code on both bit'isms.

It's also *swamped* by the memory and CPU savings of ripping out
NetworkManager by the roots, and deleting or disab ling most of the
quite bulky Gnome or KDE toolkits for most users. Pulling out the
language packages, most of which are entirely unused by anyone with a
formal education, is another profound savings in system resources,
including languages for those packages that enable the installed
languages.

I do a great deal of work in small virtual hosts, and eliminating or
refusing to use unnecessary graphical or language toolkits is a
profound resource savings.

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