As I mentioned here, there is a slight change for enabling
the [original] InnoDB Plugin in MariaDB 5.5 (as compared to how
you would enable it in 5.1).
Remember, in MariaDB 5.5, if you do not “enable” (i.e., add
anything to the config file to do so) the InnoDB Plugin in
MariaDB 5.5, you’ll end up with XtraDB+ for your InnoDb plugin.
However, if you do “enable” the InnoDB plugin, then you end up
with the original InnoDB plugin provided by Oracle/InnoDB.
The change is that the plugin file (.dll for Windows, .so file
for Linux) which was previously named “ha_innodb_plugin.dll” is
now just “ha_innodb.dll”.
Thus, if you previously enabled the plugin with (would have been
in a 5.1 instance):
[mysqld]
ignore_builtin_innodb
plugin-load=innodb=ha_innodb_plugin.dll;innodb_trx=ha_innodb_plugin.dll; …
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