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PostgreSQL 9 Administration Cookbook - Second Edition
book

PostgreSQL 9 Administration Cookbook - Second Edition

by Simon Riggs, GIANNI CIOLLI, Hannu Krosing, Gabriele Bartolini
April 2015
Intermediate to advanced content levelIntermediate to advanced
504 pages
11h 41m
English
Packt Publishing
Content preview from PostgreSQL 9 Administration Cookbook - Second Edition

Maintaining indexes

Indexes can become a problem in many database applications that involve a high proportion of INSERT/DELETE commands. Just as tables can become bloated, so can indexes.

In the previous recipe, you saw that non-HOT updates can cause bloated indexes. Non-primary-key indexes are also prone to some bloat from normal INSERT commands, as is common in most relational databases.

Autovacuum does not detect bloated indexes, nor does it do anything to rebuild indexes. So, we need to look at other ways to maintain indexes.

Getting ready

PostgreSQL supports commands that will rebuild indexes for you. The client utility, reindexdb, allows you to execute the REINDEX command in a convenient way from the operating system:

$ reindexdb

This executes ...

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Publisher Resources

ISBN: 9781849519069Supplemental Content