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New database or new instance

25 April,2015 by Tom Collins

Question: I’m setting up some new database for a spate set of Agile developers. I need to decide whether I’ll add the new database into an existing instance or create  a new instance. What criteria should I use to decide?

Answer: The main decision about deciding whether to create a new database in an existing instance or into a new instance is based on how you want to manage server resources

1)Do the databases communicate with each other? If not , then I’d place them in separate instances.

If separate instances are used, it’s much easier to ring fence server and instance resources via the Max Server Memory configurable.

Separating out into a separate instance may require some extra memory. But if extra memory is available, then I’d separate out the databases

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Author: Tom Collins (


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