Chapter 10. Effective Database Design
How important is the database when considering the performance and scalability of your application? I would argue that it usually represents about one-third of the overall challenge. Think that sounds like a lot? It's really not—in fact, for many applications this is a conservative estimate. Remember that an application consists of three things: an interface, business logic, and persistent data. Thus, if we don't consider database integration and the scalability and performance issues involved, we're tackling only two-thirds of the overall problem.
Nevertheless, there are times when tuning your database system may not be critical. Realize that modern commercial database systems are built for speed and scalability. ...
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