This disclosure describes, in part, techniques for increasing persistent connection scalability. For instance, a server may establish persistent connections with sources. The server may then determine, based on the types of persistent connections, an amount of at least one resource in use. For example, the server may determine that a first type of connection, such as an idle connection, uses a first amount of the resource(s) and a second type of connection, such as an active connection, uses a second amount of the resource(s). The server may then determine if the amount of the at least one resource in use satisfies one or more thresholds. If the amount of the at least one resource in use satisfies the one or more thresholds, the server may perform one or more actions. For example, the server may cease establishing new persistent connections, migrate the first type of connections, and/or migrate the second type of connections.