Skip to Content
PostgreSQL 10 Administration Cookbook - Fourth Edition
book

PostgreSQL 10 Administration Cookbook - Fourth Edition

by Simon Riggs, Gianni Ciolli
May 2018
Intermediate to advanced content levelIntermediate to advanced
576 pages
30h 25m
English
Packt Publishing
Content preview from PostgreSQL 10 Administration Cookbook - Fourth Edition

Table and index bloat

Table bloat is something that can develop over time if some maintenance processes can't be run properly. In other words, due to the way Multiversion Concurrency Control (MVCC) works, your table will contain a lot of older versions of rows, if these versions can't be removed in a timely manner.

There are several ways this can develop, but all involve lots of updates or deletes and inserts, while autovacuum is prevented from doing its job of getting rid of old tuples. It is possible that, even after the old versions are deleted, the table stays at its newly acquired and large size, thanks to visible rows being located at the end of the table and preventing PostgreSQL from shrinking the file. There have been cases where ...

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

PostgreSQL 13 Cookbook

PostgreSQL 13 Cookbook

Vallarapu Naga Avinash Kumar
PostgreSQL 9 Administration Cookbook - Second Edition

PostgreSQL 9 Administration Cookbook - Second Edition

Simon Riggs, GIANNI CIOLLI, Hannu Krosing, Gabriele Bartolini

Publisher Resources

ISBN: 9781788474924Supplemental Content