Skip to Main Content
Oracle Database 11g Performance Tuning Recipes: A Problem-Solution Approach
book

Oracle Database 11g Performance Tuning Recipes: A Problem-Solution Approach

by Sam R. Alapati, Darl Kuhn, Bill Padfield
August 2011
Intermediate to advanced content levelIntermediate to advanced
594 pages
15h 54m
English
Apress
Content preview from Oracle Database 11g Performance Tuning Recipes: A Problem-Solution Approach

C H A P T E R  14

Implementing Query Hints

Placing hints in SQL is a common and simple approach to improve performance. Hints influence Oracle's optimizer to take a specific path to accomplish a given task, overriding the default path the optimizer may have chosen. Hints can also be viewed as a double-edged sword. If not implemented and maintained properly, they can hurt performance in the long run.

The most popular reason to use hints is simply to get data out of the database faster, and many of the available hints are geared for that purpose. The Oracle database supports more than 60 hints, so it is apparent that hints can be placed in SQL for a multitude of reasons. The purpose of this chapter is to categorize these hints into subsets, and ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

RMAN Recipes for Oracle Database 12c: A Problem-Solution Approach, Second Edition

RMAN Recipes for Oracle Database 12c: A Problem-Solution Approach, Second Edition

Darl Kuhn, Sam Alapati, Arup Nanda

Publisher Resources

ISBN: 9781430236627Purchase book