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You're reading from  Mastering PostgreSQL 15 - Fifth Edition

Product typeBook
Published inJan 2023
PublisherPackt
ISBN-139781803248349
Edition5th Edition
Concepts
Robotic Process Automation
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Author (1)
Hans-Jürgen Schönig
Hans-Jürgen Schönig
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Hans-Jürgen Schönig

Hans-Jürgen Schönig has 20 years' experience with PostgreSQL. He is the CEO of a PostgreSQL consulting and support company called CYBERTEC PostgreSQL International GmbH. It has successfully served countless customers around the globe. Before founding CYBERTEC PostgreSQL International GmbH in 2000, he worked as a database developer at a private research company that focused on the Austrian labor market, where he primarily worked on data mining and forecast models. He has also written several books about PostgreSQL.
Read more about Hans-Jürgen Schönig

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Upgrading to synchronous replication

So far, asynchronous replication has been covered in reasonable detail. However, asynchronous replication means that a commit on a slave is allowed to happen after the commit on a master. If the master crashes, data that has not made it to the slave might yet be lost even if replication is occurring.

Synchronous replication is here to solve the problem – if PostgreSQL replicates synchronously, a commit has to be flushed to disk by at least one replica to go through on the master. Therefore, synchronous replication basically reduces the odds of data loss substantially.

In PostgreSQL, configuring synchronous replication is easy. Only two things have to be done (in any order):

  • Adjust the synchronous_standby_names setting in the postgresql.conf file on the master
  • Add an application_name setting to the primary_conninfo parameter in the config file in the replica

Let’s get started with the postgresql.conf file on...

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Mastering PostgreSQL 15 - Fifth Edition
Published in: Jan 2023Publisher: PacktISBN-13: 9781803248349
© 2023 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Hans-Jürgen Schönig

Hans-Jürgen Schönig has 20 years' experience with PostgreSQL. He is the CEO of a PostgreSQL consulting and support company called CYBERTEC PostgreSQL International GmbH. It has successfully served countless customers around the globe. Before founding CYBERTEC PostgreSQL International GmbH in 2000, he worked as a database developer at a private research company that focused on the Austrian labor market, where he primarily worked on data mining and forecast models. He has also written several books about PostgreSQL.
Read more about Hans-Jürgen Schönig

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