CHAPTER ONE: Performance Is n’t What It Used to Be

Odds are very good that one or more of your company’s database applications is suffering from performance issues. This should hardly come as a surprise to those who deal with application design, development, or deployment. What may be surprising is that the root cause of many of these issues is the database middleware, the software that connects applications to databases.

When we say performance issues, we mean your application is suffering from unacceptable response time, throughput, or scalability. Response time is the elapsed time between a data request and when the data is returned. From users’ points of view, it is the time between when they ask for some data and when they receive it. ...

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