- Plesk Onyx for Linux
How to upgrade MySQL 5.7 to MariaDB 10.2?
How to replace MySQL with MariaDB?
The upgrade from MySQL 5.7 to MariaDB 10.2 is not supported by Plesk.
According to MariaDB documentation, it is not possible due to incompatibility.
Since version 11.5, it is possible to replace the local MySQL server with an alternative database server, for example, MariaDB. Follow the instructions provided in Plesk documentation to achieve it.