EventHub throughput units are explicitly selected by the customer, and applies to all the event hubs in a Service Bus namespace. ...

EventHub throughput units are explicitly selected by the customer, and applies to all the event hubs in a Service Bus namespace. Each throughput unit entitles the following capabilities: 1 MB/s Ingress, 2 MB/s egress, and up to 84 GB of event storage. Event Hub throughput units are billed hourly, based on the maximum number of units selected during this hour.