How to fix the «'INFORMATION_SCHEMA.GLOBAL_STATUS' feature is disabled» Backupninja / Duplicity warning about backup a MySQL database?

To fix it, add the show_compatibility_56 = 1 option to the [mysqld] section of the MySQL configuration file (/etc/mysql/my.cnf).

• i-mscp.net/index.php/Thread/13361-MySQL-5-7-show-compatibility-56/?postID=45190#post45190
• dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_show_compatibility_56