Replication requires connections both to the source server and the target server. The connections to the source server are internal connections and do not count against the maximum allowed user count. The connection to the target server is counted on the target as a new user and does count toward the maximum allowed user count.
In both cases, it may be desirable to increase the connection count (see Advantage Database Server Configuration) at both source and target servers to allow for the additional connections.
To improve performance, a connection pool is used for both types of connections used by the replication processing. After approximately one minute of inactivity, unused connections will be released.