The rs_marker command is a primary database transaction log marker mechanism, which assists with the materialization process.
An rs_marker execution passes activate subscription and validate subscription commands to a primary Replication Server. Most Replication Agents support an rs_marker invocation to assist with materialization.
For more information about rs_marker usage, see the Replication Server Reference Manual. For more information about the use and availability of rs_marker for a particular database, see the appropriate Replication Agent documentation.