show variables like '%metadata%';

If you see an output such as:

innodb_stats_auto_recalc = 1, you're all set..

If you see an output such as:

 innodb_stats_on_metadata | ON    |

it means that statistics get updated whenever metadata on the table is requested, which is typically enough. But , you may still need to set that first variable –

innodb_stats_auto_recalc = 1

Here is some more info on this topic – https://mariadb.com/kb/en/library/xtradbinnodb-server-system-variables/#innodb_stats_auto_recalc

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