The address (LSN) of oldest WAL which continue to could possibly be needed by The customer of this slot and therefore won't be immediately taken out in the course of checkpoints Except this LSN receives driving in excess of max_slot_wal_keep_size from The existing LSN. NULL When the LSN of this https://paxtonksxbg.yomoblog.com/21509317/the-definitive-guide-to-lyn68