Configuring PostgreSQL CDC Replication Slots and Publications

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For each primary node database, in addition to the replication slot used for the changeset stream, more replication slots are required One added slot

But, it can also cause WAL to be purged from the source before the AWS DMS CDC task can read its changes from the replication slot So, the task fails Related replication fails with these messages repeating on the receiving server: creation of the replication slot, when the publication did not exist yet --

stars slot This means that the connector is unable to report DDL change events back to consumers Logical decoding replication slots are supported on only primary servers  Replication slots must be enabled in by setting the parameter max_replication_slots to at least the number of expected standbys (changes to this