Application Tuning

In my nearly 20 years of working with Oracle, if I had a dollar for every poorly written SQL statement, missing index, or ill-conceived transaction that I've come across, I probably would have more money than Larry Ellison. OK, that's a slight exaggeration. But seriously, here's my one-sentence theory that explains why application-side issues are typically to blame for most performance problems:

Application developers (and in some cases, database administrators) rarely test the performance of a new application in a realistic setting before deploying the application in a production environment.

Believe it or not, it's that simple. The previous example in this chapter about tuning a DSS is a perfect illustration of my real-life ...

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