In [Tune for search speed](https://www.elastic.co/guide/en/elasticsearch/reference/master/tune-for-search-speed.html#tune-for-search-speed) there are two sections recommending to map numeric identifiers as keywords. One is [Mappings](https://www.elastic.co/guide/en/elasticsearch/reference/master/tune-for-search-speed.html#_mappings) and the other is [Map identifiers as keyword](https://www.elastic.co/guide/en/elasticsearch/reference/master/tune-for-search-speed.html#_map_identifiers_as_literal_keyword_literal). Only [Map identifiers as keyword](https://www.elastic.co/guide/en/elasticsearch/reference/master/tune-for-search-speed.html#_map_identifiers_as_literal_keyword_literal) should be kept, or the sections can be merged.
In Tune for search speed there are two sections recommending to map numeric identifiers as keywords.
One is Mappings and the other is Map identifiers as keyword.
Only Map identifiers as keyword should be kept, or the sections can be merged.