pr: 138723
summary: Remove DOC_VALUES_SKIPPER feature flag
area: Mapping
type: feature
issues: []
highlight:
  title: Enable doc_values skippers
  body: |-
    Doc_values skippers add a sparse index to doc_values fields, allowing efficient
    querying and filtering on a field without having to build a separate BKD or terms
    index.  These are now enabled automatically on any field configured with
    index=false and doc_values=true if the index setting `index.mapping.use_doc_values_skipper`
    is set to `true` (default `false`, or `true` for TSDB indexes).

    TSDB indexes now default to using skippers in place of indexes for their
    @timestamp, dimension and  _tsid fields, greatly reducing their on-disk
    footprint.  To disable skippers in TSDB indexes, set `index.mapping.use_doc_values_skipper`
    to `false`.

  notable: true
