Change Apache mpm_prefork to mpm_worker

[RichBos]

Hi, we are having some issues with keep alive requests + traffic load on our Wordpress multisite and would like to try switching from Apache mpm_prefork to mpm_worker, however we are aware there may be php considerations also.

Could the process be as simple as just running 'apt-get install apache2-mpm-worker' and letting it do its thing, or might there be any other considerations? For example would we need to switch to the phpcgi or phpfcgid template for the web domain?

For info we are running Ubuntu 12.04 with Apache 2.2.22.

Any advice would be most appreciated, many thanks

Richard