I'm running Moodle '3.10.2 (Build: 20210308)' under PHP 7.2.34 (cli) on Amazon's amzn2.x86_64 Linux. And MariaDB Ver 15.1 Distrib 10.5.9-MariaDB, for Linux (x86_64). Everything runs fine for weeks at a time and then something causes Moodle and MariaDB to quit talking.
Performing a complete server reboot does not help. But restarting MariaDB with Moodle already up and running restores communications and things run for fine for days or weeks. Until something makes them stop talking.
Where is a good place to look for warnings and errors that might accompany the onset of the problem?
Thanks in advance,