# MAX_CONNECTIONS


Upper bound on simultaneous database connections.


`MAX_CONNECTIONS: Final[int] = ``128`


Exceeding this limit raises `ConnectionPoolExhausted`. The default of 128 matches the PostgreSQL `max_connections` default so that a single application instance can saturate one server without over-provisioning.


## Notes

Deployments behind a connection pooler (PgBouncer, Odyssey) can safely raise this to 500 or more, since the pooler manages the actual backend connection count.


## See Also

[MIN_CONNECTIONS](MIN_CONNECTIONS.md#gdtest_complete_docstrings.MIN_CONNECTIONS)  

[Connection](Connection.md#gdtest_complete_docstrings.Connection)