February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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How it works...
OLTP systems produce a very high transactional volume by their very nature. Any disruption to this volume is extremely visible and costly. The primary goal of running a highly available service, such as a database, is to minimize downtime. So for any database instance that is a critical component, there should be a copy of the server configured in such a manner that near-immediate promotion to production status is possible.
Any server that needs direct access to the database, whether it is a queue system, application server, or web frontend, is sensitive to database overload. One method for diffusing this risk is to create one database copy for every two to four directly connected servers. These copies are only usable for ...
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