By default, MariaDB uses the XtraDB storage engine, a performance enhanced fork of the InnoDB storage engine. For compatibility reasons, the system variables still retain their original innodb prefixes, and where the text in this knowledgebase refers to InnoDB, it can usually be understood as referring to the XtraDB fork.

Note that it is possible to use InnoDB as a plugin in MariaDB instead of XtraDB. See Using InnoDB instead of XtraDB.

Note that before MariaDB 10.0.9, MariaDB included MySQL's InnoDB as the default, with Percona's XtraDB available as a dynamic plugin. To use XtraDB in 10.0.8 and betore, the ignore_builtin_innodb variable needs to be set, and the plugin-load=ha_xtradb option provided (see Installing Plugins).