January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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Terminating and canceling user sessions
Database administrators often need to kill server processes for various reasons. For example, in certain scenarios, very slow queries running on the slave or master, which are configured using streaming replication, can break the replication.
Database connection can be terminated for several reasons, as follows:
- The maximum number of connections is exceeded: This happens in some cases where connections are misconfigured, such as when keeping IDLE connections open for a very long time, or when some sessions are opened but in a stale state.
- Dropping the database: You cannot drop a database if someone is connected to it. This is sometimes necessary in testing scenarios.
- Very slow queries: Very slow queries ...
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