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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

Using replication slots

Replication slots allow you to define your replication architecture explicitly. They also allow you to track details of nodes even when they are disconnected. Replication slots work with both PSR and LSR.

Replication slots ensure that data required by a downstream node persists until the node receives it. They are crash-safe, so if a connection is lost, the slot still continues to exist. By tracking data on downstream nodes, we avoid these problems:

  • When a standby disconnects, the feedback data provided by hot_standby_feedback is lost. When the standby reconnects, it may be sent cleanup records that result in query conflicts. Replication slots remember the standby's xmin value even when disconnected, ensuring that ...
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Publisher Resources

ISBN: 9781788474924Supplemental Content