http://blogs.msdn.com/b/arvindsh/archive/2009/07/26/resource-governor-difference-between-max-memory-percent-and-request-max-memory-grant-percent-settings.aspxResource governor is a useful feature in SQL Server 2008 which can provide instance-level throttling of CPU and memory resources. I will not dwell into the basic details and architecture, as they are very well documented in Books Online and also in theenTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)