Database error mariadb.service No space left on device?

Question

Asterisk

Freepbx, when trying to access the web interface, it gives an error.

SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)::SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

if you look at the status of Mary, it will be the following:

Mar 17 10:44:42 freepbx.sangoma.local systemd[1]: mariadb.service failed to run 'start-pre' task: No space left on device
Mar 17 10:44:42 freepbx.sangoma.local systemd[1]: Failed to start MariaDB database server.
Mar 17 10:44:42 freepbx.sangoma.local systemd[1]: Unit mariadb.service entered failed state.
Mar 17 10:44:42 freepbx.sangoma.local systemd[1]: mariadb.service failed.

The question is, how could the place run out and how to clean it?