vim /lib/systemd/system/mariadb.service
...
[Service]
LimitNOFILE=infinity
LimitMEMLOCK=infinity
...
systemctl daemon-reload
systemctl restart mariadb.service
----
===== Источники =====
* [[http://blogs.reliablepenguin.com/2015/08/28/mariadb-on-centos-7-error-in-accept-too-many-open-files| MariaDB on CentOS 7 – “Error in accept: Too many open files”]]