[mythtv-users] i386 vs x86_64 Fedora

[Gordon McCrae]

Brian Wood wrote:
> On May 15, 2008, at 7:28 AM, Mike Holden wrote:
>   
>> What about for a more general-purpose box that will be doing myth plus
>> some other stuff?
>>
>> One obvious area would be addressable memory, which is limited to a  
>> little
>> over 2 gig by 32bit O/S.
>> -- 
>>     
>
> Never thought I'd live to hear "a little over 2 gig" referred to as  
> "limited" :-)
>
> I've not found a need for more than 2G on a Myth system, but obviously  
> "other stuff" might take advantage of it, you can't ever have to much.
>
> So a 64-bit machine couldn't hurt if you can put up with things like  
> SWF and such being a little problem.
>
> But I would really suggest that a Myth machine, at least a B/E, be a  
> dedicated machine if at all possible.
>
> beww
>
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>   
Plus, 32bit CPU actually gives you exactly 4Gb (2 ^ 32 = 4Gb) 
addressable range, not 2Gb (or even a little over it). In addition, the 
system can do paging to access blocks of 4Gb at a time, it just cannot 
access more than 4Gb at once, so if you have two applications (Oracle, 
PROGRESS, whatever), they can each have 4Gb, or in fact you can allocate 
multiple listeners within the likes of Oracle 4Gb each, and then also 
look at affining processes to CPUs. In short, don't worry about running 
32bit. Right now you need to be running very specific applications to 
get any real benefit from 64 bit.

Cheers
Gordon

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