If this happens, the standby will must be reinitialized from a brand new base backup. I’d go further in depth on how indicators work, but I’ll just say that the signal can typically reverse, causing loss of sign to your receiver. Packages can request to be automatically rebuilt when the subslot of a runtime dependency changes. In case you arrange a WAL archive that is accessible from the standby, these solutions will not be required, since the standby can always use the archive to catch up supplied it retains sufficient segments. As more interest is developed you may add to a newbie set. It is essential that the entry privileges for replication be arrange so that only trusted users can learn the WAL stream, because it is easy to extract privileged information from it. WAL segments are usually not recycled too early, or by configuring a replication slot for the standby.