rds.logical_replication didn't change to 1 on aurora serverless AWS

Question

I need to change the rds.logical_replication parameter to 1 in order to get wal_level to logical.

I already changed the rds.logical_replication parameter , but when i run SHOW rds.logical_replication on my writer instance still off . Already tried applying the DB Cluster Parameter Group to the regional cluster and only to the writer instance.

I have 1 writer instance and 1 reader instance but they are serverless.

Is the ploblem that Aurora is serverless? How can i change the parameter correctly to see the changes in the writer instance?

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I tried changing the rds.logical_replication to 1 in the DB Cluster Parameter Group and applied to the Regional Cluster.

I tried changing the rds.logical_replication to 1 in the DB Cluster Parameter Group and applied only to the writer instance.

I tried to make a Parameter Group with the need values, but rds.logical_replication doesn't exist in the Parameter Group configuration.

Edit: I also rebooted the service.

I'm expecting to run SHOW rds.logical_replication and the variable is ON .

Answer 1

Aurora PostgreSQL–based DB clusters running Aurora Serverless v1 have the following limitations:

The logical replication feature available in Amazon RDS PostgreSQL and Aurora PostgreSQL isn't supported.

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/aurora-serverless.html

But for Aurora Serverless v2 is supported, please, be sure that Cluster Parameter Group is applied correctly and assign Cluster Parameter Group to Cluster level. Follow next procedure to enable rds.logical_replication. Stop and Start the Cluster to use new values.

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraPostgreSQL.Replication.Logical.html#AuroraPostgreSQL.Replication.Logical.Configure

https://aws.amazon.com/premiumsupport/knowledge-center/rds-postgresql-use-logical-replication/