Manual:$wgDBTableOptions

Details
MySQL table options to use during installation or update. $wgDBTableOptions will be set in the LocalSettings.php file generated by the installer. You can choose one of the following options resulting in the according values:


 * MySQL binary


 * MySQL UTF-8

The following setting is no longer available in current versions due to dropped MySQL 4 support:
 * MySQL 4.0 backwards-compatible UTF-8