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Edit File: mariadb-extra@.socket
[Unit] Description=MariaDB 10.11.16 database server (socket activation extra port multi-instance %I) Documentation=man:mariadbd(8) Documentation=https://mariadb.com/kb/en/library/systemd/ [Install] WantedBy=sockets.target [Socket] Service=mariadb@%i.service # An "extra" as a descriptor name that means treat these ListenStreams as # the same as an extra_port. # Ref: https://mariadb.com/kb/en/thread-pool-system-status-variables/#extra_port FileDescriptorName=extra ListenStream=@mariadb-extra-%I ListenStream=/var/lib/mysql/mysql.sock-extra-%I