max data types performance
On some occasions, migrating from text, ntext or image to varchar(max), nvarchar(max) or varbinary(max) can hurt performance. How is that possible? Well, when using text, ntext and image, SQL Server’s default behavior is to keep the LOB data outside of the row, and it just adds each row a 16 byte pointer that references to the place where the relevant LOB information is stored. When using max fields, the default is the opposite. Up to a size of 8000 bytes, SQL Server keeps LO