After having experienced systemd-related problems with my earlier MariaDB 10.3 installation on my own server, I switched to MySQL 8. The server is Ubuntu 20.04 based. After completely removing the MariaDB 10.3 and all its config files I installed MySQL 8 and re-imported the TNG database (~58000 names) had dumped from MariaDB. It all seemed to run fine, until I had to update the database with an updated GEDCOM file from Gramps were I do my research. TNG is only used to provide the data online.