I installed the server Percona Server as follows:
percona-release setup ps80
yum install percona-server-server
I started the service so:
systemctl enable mysqld.service
systemctl start mysqld.service
systemctl status mysql.service - service is active
However configuration file along the way /etc/percona-server.conf.d/mysqld.cnf - is empty
OS CentOS 7.
What did I lose sight of?