Amazon Athena queries are being queued before execution. What can the data engineer do to prevent queries from being queued?

Configuring provisioned capacity for an existing workgroup is the correct solution because it dedicates a specific amount of processing power to your Athena queries, ensuring they don't wait for shared resources. This directly addresses queuing issues by providing guaranteed capacity. Increasing the query result limit would not prevent queuing; it only affects the number of rows returned. Using federated queries allows Athena to query data sources outside of S3 but doesn't solve queuing within Athena itself. Allowing users to an existing workgroup is a permission management task and doesn't impact the underlying capacity available for query execution.