note on CPU and Memory

Author: spelluru

articles/service-bus-messaging/service-bus-metrics-azure-monitor.md

@@ -100,6 +100,10 @@ The following two types of errors are classified as user errors:
 
 > [!NOTE] 
 > The following metrics are available only with the **premium** tier. 
+> 
+> The important metrics to monitor for any outages for a premium tier namespace are: **CPU usage** and **memory size** per namespace. Set up alerts for these metrics using Azure Monitor.
+> 
+> The other metric you should monitor is: **throttled requests** (see the **Request metrics** section). It shouldn't be an issue as long as the namespace stays within its memory, CPU, and brokered connections limits. For more information, see [Throttling in Azure Service Bus Premium tier](service-bus-throttling.md#throttling-in-azure-service-bus-premium-tier)
 
 | Metric Name | Description |
 | ------------------- | ----------------- |