mycnf

Hello guys! I'm interested in upgrading and old server to MariaDB 10.1 but the starting point is MySQL 5.5. When trying to upgrade to 5.6, this warning comes up: System Specific Warnings Severity: Critical Message: The system detected issues with the current “/etc/my.cnf” file. These issues may...

Someone can explain in brief what this strange (to me) e-mail means? What mycnf_auto_adjust_innodb_buffer_pool_size = 1 do? Thank you :)