max_connections is a GUC parameter determining the maximum number of concurrent connections to the database server.
max_connections was added in PostgreSQL 7.1 (commit 6a68f426).
Default
Default value for max_connections is: 100.
Usage
On a standby, max_connections must be set to the same or higher value as on the primary.
The current value of max_connections is one of the GUC parameters recorded in pg_control.
References
- PostgreSQL documentation: max_connections