Materialize/doc/user/shared-content/cluster-replica-cost-capacity-notes.md

• Each replica incurs cost, calculated as cluster size * replication factor per second. See Usage & billing for more details.

• Increasing the replication factor does not increase the cluster's work capacity. Replicas are exact copies of one another: each replica must do exactly the same work as all the other replicas of the cluster(i.e., maintain the same dataflows and process the same queries). To increase the capacity of a cluster, you must increase its size.