On Sep 24, 6:07 pm, "David Durham, Jr." <[EMAIL PROTECTED]>
wrote:
> On Wed, Sep 24, 2008 at 6:14 AM, mcosta <[EMAIL PROTECTED]> wrote:
> > One question: ¿amd64 or x86? we've got some bechmark claiming superior
> > performance for amd64, both with python and mysql, but then we can not
> > tune with psyco. We've taken a look at pyrex but we do not know even
> > if we are shooting in our foot with any of these. ¿are these
> > technologies useful for actual web app tuning?
>
> I think the primary difference is the amount of RAM that is supported
> and whether or not you have compatible software.  With that said, all
> modern processors are x64 so you probably want to default with an x64
> OS unless you need x86 for software compatibility reasons.

That's not what our tests tells. Just swaping operating system build
for amd64 gives some 10% ~ 15% gain. It's a gain that enables
inserting a small site into the same box.

I like to do my own tests, so I ignore the published ones. But a quick
google search shows the same I stated above:

http://www.scribd.com/doc/363677/Benchmarks-AMD64-in-32bit-mode-vs-64bit-mode-Ubuntu

But how I told, we have real world fact with LAMP + cakePHP, and not
with Linux+(cherokee, apache)+Mysql+(django, pylons) etc
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