PostgreSQL Documentation: port parameter

Type:	`integer`
Default:	`5432`
Min:	`1`
Max:	`65535`
Context:	`postmaster`
Restart:	`true`

Sets the TCP port the server listens on

The TCP port the server listens on; 5432 by default. Note that the same port number is used for all IP addresses the server listens on. This parameter can only be set at server start.

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Recommendations

Alternate ports are primarily useful for running several versions, or instances, of PostgreSQL on one machine. However, if you're using an alternate port to support several versions, it's often better to compile in the port number.

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