I’m building a new Ansible playbook for setting up web servers with Debian 8. I have always used mod_php before and it has been very stable but have some well known drawbacks. Since Debian 8 comes with Apache 2.4 and PHP 5.6 I wanted to implement PHP-FPM that seems very promising.
With mod_php every Apache process will need to load PHP and therefor use a lot more RAM than needed, even for just serving static content like images and css. I have been running Lighttpd as a static file server to mitigate this problem.