| Type: | integer |
| Default: | 60000 (1min) |
| Min: | 0 (0ms) |
| Max: | 2147483647 (2147483647ms) |
| Unit: | milliseconds (ms) |
| Context: | sighup |
| Restart: | false |
| Since: | 9.3 |
Terminate replication connections that are inactive for longer than this amount of time. This is useful for the receiving standby server to detect a primary node crash or network outage. If this value is specified without units, it is taken as milliseconds. The default value is 60 seconds. A value of zero disables the timeout mechanism. This parameter can only be set in the postgresql.conf file or on the server command line.
On StackOverflow
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On pgsql-hackers
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