Hi,
Le ven. 17 janv. 2025 à 15:38, Franjo Stipanovic <fritzfs@xxxxxxxxx> a écrit :
Question regarding autovacuum settings in a PostgreSQL streaming replication setup. Specifically, I am curious about whether it is possible (and advisable) to have different values for the following settings on the master and replica databases:
- autovacuum_vacuum_scale_factor
- autovacuum_analyze_scale_factorCan the above settings be configured differently on the master and replica databases in a streaming replication setup? I just tested this on AWS RDS Postgres.
They could but it doesn't matter. VACUUM and ANALYZE aren't executed on replicas because they are write operations, and you can't write on replicas.
How would those different settings interact with replication, for example, if I apply change on master, would it be replicated to replica and override my replica setting?
Changes on the postgresq.conf file aren't replicated, but ALTER TABLE ... (SET autovacuum...) are.
I was expecting that this is not possible in streaming replication, only in logical replication.
You're right, it's not possible.
Guillaume.
