Not sure if this should be posted in performance or themes: I am using using version 3.9.2. with the Boost theme. Moodle was installed at SiteGround using their installer. Everything checked out ok until the number of users climbed over about 50. As the number climbed to 250, the 500 internal server errors happened to most users. Siteground support noticed that the number of server processes allowed was exceeding the maximum by 10 times or more. Most of the processes were of this type:
root 32068 0.0 0.0 236 4 ? S 22:28 0:00 /usr/local/1h/sbin/hive_exec ~1085 1085 styles_debug.php
All the scripts seem to be leading to this: Timeout waiting for output from CGI script /home/u586-qyz54a5t7s8s/w.../public_html/contest/theme/styles_debug.php
The most executed scripts during the problem were:
774952.../theme/styles_debug.php /home/u586-qyz54a5t7s8s/www/fenwickscience.com/public_html/contest/theme/styles_debug.php
17397 ...theme/image.php /home/u586-qyz54a5t7s8s/...public_html/contest/theme/image.php
8549 ...pluginfile.php home/u586-qyz54a5t7s8s/www/...public_html/contest/pluginfile.php
7576 ...lib/ajax/service.php /home/u586-qyz54a5t7s8s/...public_html/contest/lib/ajax/service.php
4847 .../theme/font.php /home/u586-qyz54a5t7s8s/...public_html/contest/theme/font.php
I'm not using any third party plugins. I have the Fordson theme installed but am not using it.
I'm at a loss. Again, this issue is directly related to the traffic volume at the site, but it doesn't seem as though 200 users should crash it.