Need recommendation on the value of 'k' passed for ANN search - https://opensearch.org/docs/latest/search-plugins/knn/approximate-knn/#get-started-with-approximate-k-nn

Need recommendation on the value of 'k' passed for ANN search - https://opensearch.org/docs/latest/search-plugins/knn/approximate-knn/#get-started-with-approximate-k-nn #239