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On to Chapter 2

In this chapter, we looked at some key issues of dealing with performance problems: why it is essential to approach performance problems at the right moment and in a methodological way, why understanding business needs and problems is absolutely important, and why it is necessary to agree on what good performance means.

Before describing how to answer the three questions in Figure 1-4, it is essential that I introduce some key concepts that I'll be using in the rest of the book. For that purpose, Chapter 2 will describe the processing performed by the database engine to execute SQL statements. In addition, I'll define several frequently used terms.



1. Note that a user is not always a human being. For example, if you are defining requirements for a web service, it is likely that only other applications will use it.


  

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