Use the alter logical connection command to disable the Distributor Thread.
If you do not replicate data from the active database into
databases other than the standby database, Replication Server does
not need a Distributor thread for the logical connection. You can
disable the Distributor thread to save Replication Server resources.
To
disable the Distributor thread, you must first drop any subscriptions
for the data in the logical database. Then execute
alter
logical connection at the Replication Server:
alter logical connection
to logical_ds.logical_db
set distribution off
If you decide later to replicate data out of the active database,
you can use this command to reenable the Distributor thread.
Warning! If
you disable the Distributor thread and then drop the standby database
from the replication system, no Replication Server threads will
be left to read the inbound queue from the active database. The
inbound queue will continue to fill until you either add another
standby database, set distribution to “on” for
the logical connection, or drop the active database from the replication
system.