February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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We have mentioned this tip previously, but this deserves special attention. PostgreSQL 9.2 and above now has the capability to stream replicated data from one database standby to another. Even with 10 GbE network cards, there is a limit to the amount of data our production server can or should transmit.
While there is still a limit to the number of replicas we can maintain with this new functionality, we also mitigate overall traffic, and therefore reduce risk. If our database is stuck on a version before 9.2, we may never realize these new benefits.
At the time of writing, PostgreSQL 12 is the latest release and versions lower than 9.4 are no longer supported. A crafty DBA can encourage the company to adopt a forward stance ...
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