Optimizing worker_processes, worker_connections & PHP_FCGI_CHILDREN - Any Good Tutorial?

[Rahul Bansal]

@jerome

>I don't know if it's possible yet, I have to check it out and think
>about it. Since FPM has a different design than the php-f?cgi, it's
>time to make a new request on bugs.php.net for FPM (not for php-cgi)

I am using PHP version 5.2.10-2ubuntu6.4
Which is better in this case?
php-FPM or php-fcgi?

Thanks,
Rahul