1) Go to ystem utilitites - Technical Support page 2) Check MariaDB Tuning Info, show like below: MariaDB Tuning (/etc/my.cnf) - [ <a class="linkOverDark" href="https://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html">Documentation</a> ] Note: Many changes below require a database restart Looks ugly.  Cacti 1.2.4 FF rhel7 x86_64