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From https://technet.microsoft.com/en-us/library/ms180797(v=sql.105).aspx > The min server memory and max server memory configuration options establish upper and lower limits to the amount of memory used by the buffer pool of the Microsoft SQL Server Database Engine and > SQL Server as a process acquires more memory than specified by max server memory option. Both internal and external components can allocate memory outside of the buffer pool, which consumes additional memory, but the memory allocated to the buffer pool usually represents the largest portion of memory consumed by SQL Server.