Hello,
I am finishing the deployment of the following on a Dell R630 (2x Xeons 2630 + 96 GB RAM) server running CentOS 8.1
Moodle 3.8.1+
(PHP-FPM) PHP 7.2.11
PostgreSQL 10.6
Apache 2.4.37
Memcached 1.5.9
SELINUX Disabled
So far everything works properly, however I have noticed the following problem when I run a Cache performance test following the following route: Dashboard -> Site administration -> Plugins -> Caching -> Test performance
Whena test of more than 25k requests is executed, the browser stays loading for several seconds and finally stops and returns a completely blank page without the Moodle favicon. However, if run a test for less than 25k request, the page stays loading for a few seconds and finally returns a page with the test result.
Curiously, this problem only occurs on the physical server, I have recreated all the steps in a VM with the same components and all the tests work correctly even with 100k requests.
I have reviewed all possible logs in PHP-FPM, Apache and there are no error messages when this problem occurs.
Any idea what might be happening here or where I could look more closely? I do not attach logs because I have not found any error log related to this problem.
Any ideas are appreciated and thanks in advance for your time!!