Couchbase version 7.6 introduces Vector Search, expanding its search capabilities by allowing similarity searches instead of exact matches. This allows for more efficient queries and better performance in terms of time and data passed between nodes. However, slow queries can still occur due to inefficient indexes, large K values, or constantly changing data. Identifying slow queries is crucial, and understanding the factors contributing to them is essential. Factors such as index size, number of partitions, and K value play a significant role in query performance. Additionally, constantly changing data and other issues like query timeouts, max result window exceed, partial results, rejected by app herder, search in context failure, consistency errors, and bad requests can also cause queries to fail. To leverage Vector Search effectively, users need to understand its functionalities, including querying, indexing data, and managing system behaviors under various conditions.