On 2020-Jun-17, Fujii Masao wrote: > The document explains that restart_lsn column in pg_replication_slots view is: > > The address (LSN) of oldest WAL which still might be required by > the consumer of this slot and thus won't be automatically removed > during checkpoints. > > But the latter part is not true in v13 thanks to max_slot_wal_keep_size. > I think that we need to update it as follows. Thought? > > The address (LSN) of oldest WAL which still might be required by > the consumer of this slot and thus won't be automatically removed > during checkpoints unless this LSN gets behind more than > max_slot_wal_keep_size from the current LSN.
We just added the invalidated_at LSN to replication slots; while working on the tests for that today, I was thinking that it might be useful to display that LSN in pg_replication_slots. What do you think of the idea of publishing the invalidated_at LSN in pg_replication_slot.restart_lsn when the slot is invalid? -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
