Which is the best metric to monitor?

You have an enterprise data warehouse in Azure Synapse Analytics.

You need to monitor the data warehouse to identify whether you must scale up to a higher service level to accommodate the current workloads.

Which is the best metric to monitor? More than one answer choice may achieve the goal. Select the BEST answer.
A . CPU percentage
B . DWU used
C . DWU percentage
D . Data IO percentage

Answer: B

Explanation:

DWU used, defined as DWU limit * DWU percentage, represents only a high-level representation of usage across the SQL pool and is not meant to be a comprehensive indicator of utilization. To determine whether to scale up or down, consider all factors which can be impacted by DWU such as concurrency, memory, tempdb, and adaptive cache capacity. We recommend running your workload at different DWU settings to determine what works best to meet your business objectives.

Reference: https://docs.microsoft.com/bs-latn-ba/azure/synapse-analytics/sql-data-warehouse/sql-data-warehouse-concept-resource-utilization-query-activity