We support pretty old DB server versions. For those who are using them, this has only performance drawbacks. We impose no hard DB version requirements, and there are no plans to change this with v1.4. Still, we should apply soft pressure by slowly raising our stated requirements.

Requirements will change as follows:

• MySQL >= 5.6 (2013, EOL since more than a year) -> 5.7 (2016)
• MariaDB >= 5.5.3 (EOL 2020) -> 10.3 (2017)