Microsoft SQL Server
Logging changes to sys.configurations
Some server wide settings can have major negative impact if they are changed in your SQL Server environment. So as a DBA it is a good practice to monitor changes to these setting, and to raise alerts when they are changed. To do this, the system view sys.configurations can be monitored for changes.
This blog post will demonstrate a way to monitor SQL Server configuration settings. The solution will also give you get the complete history for the different settings in sys.configurations.
Note that database mail needs to be configured for the current solution to work properly.