The update to **mariadb 10.4.6-1** and later changes configuration layout as recommended by upstream. The main configuration file moved from `/etc/mysql/my.cnf` (and its include directory `/etc/mysql/my.cnf.d/`) to `/etc/my.cnf` (and `/etc/my.cnf.d/`). Make sure to move your configuration. Instantiated services (like `mariadb@foo.service`) are no longer configured in separate files (like `/etc/mysql/myfoo.cnf`). Instead move your configuration to configuration blocks with group suffix in main configuration file, one for each service. A block should look something like this: [mysqld.foo] datadir = /var/lib/mysql-foo socket = /run/mysqld/mysqld-foo.sock ... Like every mariadb feature update this requires the data directory to be updated. With the new configuration in place run: systemctl restart mariadb.service && mariadb-upgrade -u root -p URL: https://www.archlinux.org/news/mariadb-104x-update-requires-manual-intervent...