I have a VPS, with 2 GBytes of RAM on an Ubuntu 14 machine. After a while I decided to upgrade my packages in the machine, including installing the latest version of apache2 (2.4.7).
However, after a few days, problems have began to appear regarding my wordpress (v 4.0) installation. When I restart the apache server, it does fine, serving pages. Then, after a few hours, any request to the server takes 1-2 minutes to get a response. I don't have much traffic to the web server, to justify this delay. Not by a long shot. This also happens regarding HTML pages, not just PHP.
When I restart the apache server, everything is OK, until problems start again, after a few hours, when the server becomes unresponsive.
Here is my /etc/apache2/mods-enabled/mpm_prefork.conf file:
<IfModule mpm_prefork_module> StartServers 10 MinSpareServers 10 MaxSpareServers 30 MaxRequestWorkers 100 MaxConnectionsPerChild 2000 </IfModule>
I have also tried to increase those numbers (up to the point where the apache processes would consume as high as 1,6GB) to no avail.
I don't know many things about apache configurations, can anyone point me in the right direction to find the error?