[jesusmichael]

I'm not sure what your goal is here... manage CPU load or traffic load? Sounds like you have a couple of problems.

1. Web services (http), how much traffic? What version of PHP? Did you shut down all unnecessary modules?

2. Inbound traffic (content generation) These processes are creating content on the fly, or writing to the DB?

Reality is it would cost you less (time is money), to put in a couple of multi-core processors and 4Gs of RAM, and its going to be necessary if traffic continues to grow.

Also you can offload much of the static serving load to AWS S3. There is a CDN for Wordpress that's free too.