There is one LTM user thread for each primary database that the Replication Server manages. The LTM user thread manages an LTM connection. It verifies that LTM submissions are valid and writes them into the inbound stable queue for the database.
If the connection between an LTM and a Replication Server is broken, the LTM user thread shuts down.
You can monitor general information on current Replication Server threads by using the command admin who. On the display output, the LTM user thread appears as “LTM USER”.