I am getting this message..
*****
Sorry! This site is experiencing technical difficulties.
Try waiting a few minutes and reloading.
(Cannot contact the database server) You can try searching via Google in the meantime. Note that their indexes .....
*****************
But not very often. Comes and goes. Where do I look for debugging information? The Apache logs don't help.
Apache 2.2 MediaWiki 1.23.3 PHP 5.4.4-14+deb7u14 (cgi-fcgi) MariaDB 5.5.39-MariaDB-1~wheezy
Gordo