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To better manage demand, it would be ideal to move Reference Databases to centralized/shared infrastructure. Reference Databases are typically structure-only databases without any significant amount of data (you may still need lookup data or test data to validate objects), one could put large number of Reference Databases on single SQL Server instance. The number of Reference Database per instance would be dictated by the size of each Reference Database (size depends on number of objects in the database and the amount of data needed in the database).
How many Reference Databases can you put on a single SQL Server instance?
Reference Database for Oracle 11g
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