The correct action is to increase the maximum bound of the SQL endpoint’s scaling range. This allows more clusters to be added, enabling queries to run on available clusters instead of waiting in the queue. This approach is effective for improving throughput during peak usage times by scaling out (adding more clusters). Scaling up (increasing cluster size) is more suited for improving the performance of individual queries rather than handling increased concurrency. The Serverless feature and Auto Stop feature do not directly address the issue of concurrent query performance degradation.