64bit is a "must have" when you operate a big enough database server.
http://www.mysqlperformanceblog.com/2008/07/25/the-1-mistake-hosting-providers-make-for-mysql-servers/

<http://www.mysqlperformanceblog.com/2008/07/25/the-1-mistake-hosting-providers-make-for-mysql-servers/>
Tyrael

On Wed, Jun 2, 2010 at 8:17 AM, Gary Stanley <[email protected]>wrote:

> At 06:57 AM 6/1/2010, D4rKr0W wrote:
> >Il 01/06/2010 11:56, Gary Stanley ha scritto:
> > > 64bit OS is irrelevant because the binaries are 32bit and run in
> > > compatibility mode, and not long mode.
> > >
> > > You cannot tell the difference between a 32bit binary that runs on a
> > > flat 32bit system and a 32bit binary on a 64bit system (in
> > compatibility mode)
> >
> >My concern was about the other applications (mainly LAMP) that run on
> >the server. If i can somehow run those more smoothly - which is the
> >whole point of using a 64bit os, i thought i could have more resources
> >free for the gameservers to use, and that seems to be the case. The load
> >average seems to be lower since i switched, but i'll have to get the
> >machine tested a bit better to be sure.
>
> If you need full blown 64bit registers and the benefits (crypto on
> 64bit is actually quite fast) then use it.. most people can't really
> tell a difference. 64bit code can sometimes
> consume more memory than 32bit code because of alignment padding /
> memory enlargement.
>
>
>
>
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