Couchbase has introduced the Index Advisor Service to optimize query performance by providing index recommendations for queries, especially for those using N1QL (SQL for JSON). This service helps DBAs, developers, and architects by suggesting appropriate indexes to improve query efficiency without the need to download the latest Couchbase server. The Index Advisor is part of Couchbase Server 6.5 and can offer advice for both regular and covering indexes, even for older server versions. It analyzes queries and recommends indexes based on the order of predicate types and other factors, enhancing performance by suggesting minimal and covering indexes that avoid unnecessary data retrieval. The tool, which currently outputs recommendations in JSON format, aims to expand its capabilities, including UI improvements and support for user-provided data and existing indexes.