The description of the query service metrics are incorrect.

https://docs.couchbase.com/server/current/metrics-reference/query-service-metrics.html

n1ql_request_time   

Current text: Total end-to-end time to process all queries

Please change it to: Average time to process all queries

n1ql_service_time     

Current description: Time to execute all queries.

Please change it to: Average time to execute all queries