Webserver - Memory-bound or CPU-bound? [closed]

Posted by JJP on Server Fault See other posts from Server Fault or by JJP
Published on 2012-12-05T22:33:31Z Indexed on 2012/12/05 23:06 UTC
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memory

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server-setup

Possible Duplicate:
How do you do Load Testing and Capacity Planning for Web Sites

I'm installing a social network using Zend Framework & MySql, with lots of plugins & queries. I want Webserver & Sql server on one box.

I'm trying to choose between two machines (on hetzner.de):

A) intel i7-2600 3.4 GHz 16 GB DDR3 RAM

B) intel i7-920 2.6 GHz 24 GB DDR3 RAM

B has 50% more RAM but 30% slower clock speed. Q is: is it obvious where the bottleneck will be? Would I ever need 24GB of RAM, even with lots of concurrent users?

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