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Troubleshooting Oracle Performance, Second Edition
book

Troubleshooting Oracle Performance, Second Edition

by Christian Antognini
June 2014
Intermediate to advanced content levelIntermediate to advanced
740 pages
23h 59m
English
Apress
Content preview from Troubleshooting Oracle Performance, Second Edition

CHAPTER 2

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Key Concepts

The aim of this chapter is threefold. First, to avoid unnecessary confusion, I introduce some terms that are used repeatedly throughout this book. The most important include selectivity and cardinality, cursor, soft and hard parses, bind variable peeking , and adaptive cursor sharing. Second, I describe the life cycle of SQL statements. In other words, I describe the operations carried out in order to execute SQL statements. During this discussion, special attention is given to parsing. And third, I describe how to instrument application code and database calls.

Selectivity and Cardinality

The selectivity is a value between ...

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Publisher Resources

ISBN: 9781430257585Purchase book