LAMP on Ubuntu 14.04 with Apache Event MPM

Question

Hi,

I came across some really excellent tutorials on DigitalOcean on how to install LAMP on Ubuntu, but none of them mention anything about choosing a specific Apache MPM (Multi Processing Module).

The latest versions of Apache offer the Event MPM, which is the Apache’s only hope and fighting chance for good benchmarks against NGINX. The Ubuntu 14.04 LAMP image is configured with the oldest Prefork MPM, which is also the clumsiest and RAM hungriest of all Apache MPMs.

It would be great to see a tutorial on how to configure Apache in a LAMP setup to use the Event MPM with - or without - PHP-FPM.

Much appreciated!

Yuri Stoyanov · Answer

Excellent, thank you!

Andrew SB · Answer

Assuming that you’re starting with a basic LAMP stack, to get Event MPM and PHP-FPM up and running on Ubuntu 14.04 first install these packages: sudo apt-get install libapache2-mod-fastcgi php5-fpm apache2-mpm-event Then create the file /etc/apache2/conf-available/php5-fpm.conf with the contents: AddHandler php5-fcgi .php Action php5-fcgi /php5-fcgi Alias /php5-fcgi /usr/lib/cgi-bin/php5-fcgi FastCgiExternalServer /usr/lib/cgi-bin/php5-fcgi -socket /var/run/php5-fpm.sock -pass-header Authorization Require all granted Then enable the new mods and config: sudo a2enmod actions fastcgi alias sudo a2dismod mpm_prefork php5 sudo a2enconf php5-fpm sudo a2enmod mpm_event sudo service apache2 restart You should be all set to go!

Yuri Stoyanov · Answer

Hey, what would be the recommended values for the Apache with Event MPM settings, and where is the configuration file to put them in? I didn’t find them (even the defaults) specified in the main apache2.conf . I know these settings depend mostly on the RAM available to the server, so if I get a recommendation for one droplet size, then I can scale accordingly for other sizes. Here is an example I found online: StartServers 3 MinSpareThreads 75 MaxSpareThreads 250 ThreadsPerChild 25 MaxClients 400 // MaxRequestWorkers MaxRequestsPerChild 0 // MaxConnectionsPerChild As it turns out, PHP-FPM has its own equivalent settings, like pm.max_children , pm.start_servers , pm.min_spare_servers , pm.max_spare_servers , pm.max_requests , etc. Are these use together with the Apache settings, i.e. for dynamic content, or they complement/supercede them? Here’s an example for these (I understand they are specified in the FPM’s php.ini ): pm.max_children = 10 pm.start_servers = 2 pm.min_spare_servers = 1 pm.max_spare_servers = 5 pm.max_requests = 0 Thanks in advance! Yuri

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LAMP on Ubuntu 14.04 with Apache Event MPM

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LAMP on Ubuntu 14.04 with Apache Event MPM