Memory usage estimation for PHP-FPM

Hello All,

As I know, Fast CGI requires more memory.

May I have a ballpark estimation of the PHP-FPM memory usage?

Or Is 8GB memory sufficient for a server with a 200 users to run with PHP-FPM ?
Generally I guess around 40 users who runs PHP,
and current (suPHP) 5 min load average is below 2.0

Thank you very much for your kind advice.
Regards

Usage depends on the usage of your websites. PHP-FPM uses ondemand model, which starts the process only if the website is in-use (gets requests). I would recommend you to give it a try. However, if you use Apache, please try PHP-FastCGI instead of PHP-FPM, because the are still some apache-related issues left.