DB Connections

The number of connections is the number of databases that can be simultaneously connected to an application. The number of connections is irrelevant to the maximum number of users allowed by your applications or websites.

• For a cluster instance, the number of connections is the number of connections between the client and the mongos nodes.
• For a replica set instance, the number of connections is the number of connections between the client and the primary and secondary nodes.
• For a single-node instance, the number of connections is the number of connections between the client and the node.