All-in-One WP Migration plugin uses MySQL/MariaDB to retrieve and store WordPress data (posts, pages, comments, users…). On severely limited hosting plans, it is possible to encounter a database limit set by the hosting provider.

Here is a list of all the limits that can be reached when using All-in-One WP Migration:

MAX_QUERIES_PER_HOUR
The number of queries that an account can issue per hour.

MAX_UPDATES_PER_HOUR
The number of updates that an account can issue per hour.

MAX_CONNECTIONS_PER_HOUR
The number of times an account can connect to the server per hour.

MAX_USER_CONNECTIONS
The number of simultaneous connections allowed.

If you encounter such a limit, contact your hosting provider and ask if they can increase it.