ApsaraDB RDS:Logical Replication Slot Failover

If the max_wal_size parameter is too low, PostgreSQL may delete WAL data before it has been streamed to BigQuery, which can cause the

Replication slots make sure that the new primary can carry on streaming changes from where the old primary left off This minimizes data loss

postgresql create replication slot Specifies the maximum number of replication slots that the server can support The default is 10 This parameter can only be set at server

postgresql drop replication slot A physical replication slot prevents a source DB instance from removing WAL data before it's consumed by all read replicas Each read replica has its own