Then what is the purpose to shipping the archived WAL files to the slave? i.e. if wal_keep_segments has to be high enough to cover any replication lag anyways, then should I even bother shipping them over?
Oh. I just noticed that you set up restore_command on slave, so if streaming replication failed due to a WAL file already removed on master, slave process will try to fetch missing WAL files from the archive.
