pg_upgrade: the tricky and dangerous parts
Postgres FM
How to Create a Replication Slot
If no one is using this slot, we have a lesson position. And once we do it, was are starting to accumulate on the primary more and more. If we keep this this slot unused, we know they will be we will be out of disk space. So we should move fast, or we should have a lot ofdisk space. Now we have a trick. We can switch from physical replication to logical. This is how we can very quickly initialize logical replica based on physical replica in cases where when you need all of database or majority of tables to be replicated.
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