Database bottleneck - MYSQL / Mongo / Other

Hi,

I am starting to create a website that is focused around getting data from a database. It is basically a community forum style site. I expect there to be a lot of traffic and concurrent users and I am almost certain that the database, if anything, will be the bottleneck.

I was wondering if MongoDB would offer better performance than MySQL with a PHP coded site. It seems that MongoDB is faster, but is only worthwhile in certain situations. Would something like a forum be one of these situations?

Regards,

James

feh !!

actually, your application language is the bottleneck

how come you aren't asking for alternatives to using php?

Im pretty happy with the performance I'm going to achieve with PHP.

What I want to know is, my database is going to be pretty structured and logical. My impression is that the performance of Mongo comes from reading databases which are a bit more scattered and unstructured.

Does this mean, in this instance, im better sticking to MySQL?