If this happens, the standby will have to be reinitialized from a brand new base backup. I’d go additional in depth on how alerts work, but I will simply say that the sign can generally reverse, causing loss of signal to your receiver. Packages can request to be mechanically rebuilt when the subslot of a runtime dependency changes. In case you set up a WAL archive that’s accessible from the standby, these solutions should not required, since the standby can always use the archive to catch up offered it retains enough segments. As extra curiosity is developed you’ll be able to add to a newbie set. It is very important that the entry privileges for replication be arrange in order that solely trusted users can learn the WAL stream, as a result of it is easy to extract privileged info from it. WAL segments will not be recycled too early, or by configuring a replication slot for the standby.