How to further boost the score given by field_value_factor with ElasticSearch?
Function score can be cascaded so a combination of boost_factor and field_value_factor should allow you to achieve the same.
{ "query": { "function_score": { "query": { "match_all": {} }, "functions": [ { "boost_factor": <alpha> }, { "field_value_factor": { "field": "popularity", "factor": <beta>, "modifier": "log1p" } } ], "score_mode": "multiply" } }}