March 2017
Intermediate to advanced
360 pages
7h 29m
English
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Chapter 12. Database Indexing
In this chapter, we will cover the following recipes:
- Measuring query and index block statistics
- Index lookups
- Comparing indexed scans and sequential scans
- Clustering against an index
- Concurrent indexes
- Combined indexes
- Partial indexes
- Finding unused indexes
- Forcing a query to use an index
- Detecting missing indexes
- Concurrent indexes
Introduction
Indexes play a crucial role in a database as they improve the query response time by adding an amount of overhead for each write operation of a table. Creating or dropping an index is an important responsibility for a DBA as they need to make a choice by looking at the read and write ratio of the database tables. A wise move would definitely be to increase the database performance, ...
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