> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/release-notes/community-server/about/compatibility-and-differences/system-variable-differences-between-mariadb-and-mysql/system-variable-differences-between-mariadb-and-mysql-unmaintained-series.md).

# System Variable Differences Between MariaDB and MySQL - Unmaintained Series

The following articles list the differences between the system variables available in MariaDB and in MySQL for each of the major MariaDB series that are no longer maintained.