Hi, I'm testing the ability to have a logical replica subscribed from a standby.
Of course, I'm doing this in a laboratory with no activity so everything get stuck after creating the subscription (the main slot). This is clearly because every time it will create a temp slot for copy a table it needs the running xacts from the primary. Now, I was solving this by executing CHECKPOINT on the primary, and also noted that pg_switch_wal() works too. After that, I read about pg_log_standby_snapshot(). So, I wonder if that function is really needed because as I said I solved it with already existing functionality. Or if it is really needed maybe it is a bug that a CHECKPOINT and pg_switch_wal() have the same effect? -- Jaime Casanova Director de Servicios Profesionales SYSTEMGUARDS - Consultores de PostgreSQL
