I just upgraded the MariaDB to version 10.3 so I can upgrade the Moodle to 3.9. When It is at 3.8 running MariaDB 5.5, I placed some recommended settings in the my.cnf file for InnoDB settings.
When I upgraded the MariaDB, those settings were causing error and I had to comment them out.
Is there any recommended MariaDB configuration settings I need to add instead of running it on a default setting?
Please ... 'guru'???!!! More like 'guessed right 3 times in a row'!
Anyhooo ... 'rattled' my tree ... so a response ... kinda.
Chuckle ... see the config file is well commented ... even 'who to blame'? (not really).
The only reason for suggesting not sharing ... OP we do now know, copies and paste without checking docs for DB servers.
Some settings I had for MySQL 5.6 no longer needed in 5.7 ... and beyond.
Which error did you receive after upgrading? I had to run a special mysql_upgrade tool after the upgrade. After that upgrade MariaDB ran without problems.