Can't start mysql

I can’t start mysql since I resize to droplet

root@ohmygodzilla:~# systemctl status mariadb.service ● mariadb.service - MariaDB database server Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Wed 2018-10-31 02:25:05 UTC; 3min 32s ago Process: 9847 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION (code=exited, status=1/FAILURE) Process: 9758 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= || VAR=/usr/bin/galera_recovery; [ $? -eq 0 ] && s Process: 9754 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS) Process: 9751 ExecStartPre=/usr/bin/install -m 755 -o mysql -g root -d /var/run/mysqld (code=exited, status=0/SUCCESS) Main PID: 9847 (code=exited, status=1/FAILURE) Status: “MariaDB server is down”

Oct 31 02:25:02 ohmygodzilla systemd[1]: Starting MariaDB database server… Oct 31 02:25:02 ohmygodzilla mysqld[9847]: 2018-10-31 2:25:02 140680916444096 [Note] /usr/sbin/mysqld (mysqld 10.1.26-MariaDB-0+deb9u1) s Oct 31 02:25:05 ohmygodzilla systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE Oct 31 02:25:05 ohmygodzilla systemd[1]: Failed to start MariaDB database server. Oct 31 02:25:05 ohmygodzilla systemd[1]: mariadb.service: Unit entered failed state. Oct 31 02:25:05 ohmygodzilla systemd[1]: mariadb.service: Failed with result ‘exit-code’.