yii for a big aplication

Hi i want to know about if yii have the "capacity" to handle big projects.

most like an php app than a website.

or yii is most like only for a web sites… small/mediums…

i need to do a realy complex aplication with many forms and relations.

i will use postgresql and php 5.3.

if yii my best choice?

Did you have a look in the Yii Powered forum?

The pinned sites are high traffic sites.

Optimise the most expensive db operations to use SQL instead of DAO and it should save a lot of memory.

Don’t optimise where you don’t need to optimise though.

it’s ok but i need more than speed

i talk about "complex" capacity flexibility etc…