Diff Tools for MySQL Configurations
From Webyog blog two tools to compare and diff both the static and runtime configurations of MySQL servers:
pt-config-diffpart of the Percona toolkit (free)- MONyog visual diff and configuration tracker (commercial)
Original title and link: Diff Tools for MySQL Configurations (©myNoSQL)
via: http://www.webyog.com/blog/2012/09/26/monitoring-your-mysql-configuration/