Getting Startedwith pureQuery

5
Chapter 5 - Developing for performance
In this chapter we will discuss how tools can help you gain better insight into the
performance of specific SQL statements and get advice to improve and tune your
database. Later chapters will discuss ways pureQuery can help you solve the performance
problems you might uncover in this chapter. Chapter 6 and Chapter 7 will discuss how
through client optimization you can collect SQL statements and then use the
pureQueryXML Editor (Chapter 3) to replace a specific statement with an optimized one in
order to increase performance. Chapter 4 will introduce how, through tooling, you can use
the Static Binder utility and create database packages to run static SQL and increase
performance when executing your application.
5.1 Developing for performance: The big picture
With ODS, through the SQL Outline, you can gain insight into how much time was spent
executing a specific SQL statement and how often was that statement executed. You can
also gather and view Explain data to quickly to find the most costly queries.
Figure 5.1 - Identify the SQL statements and the frequency of their execution