| Type: | integer |
| Default: | 0 |
| Min: | 0 |
| Max: | 262143 |
| Context: | postmaster |
| Restart: | true |
| Since: | 16 |
Determines the number of connection slots that are reserved for connections by roles with privileges of the pg_use_reserved_connections role. Whenever the number of free connection slots is greater than guc-superuser-reserved-connections but less than or equal to the sum of superuser_reserved_connections and reserved_connections, new connections will be accepted only for superusers and roles with privileges of pg_use_reserved_connections. If superuser_reserved_connections or fewer connection slots are available, new connections will be accepted only for superusers.
The default value is zero connections. The value must be less than max_connections minus superuser_reserved_connections. This parameter can only be set at server start.