We have query where we are excluding long text field "content" from query (including other 7-8 fields) but highlighting on "content" and "description" field ("content is excluded from source") . My question is how many time _source field will be fetched
- Only once
- Twice as once for fetching other fields and one more time to fetch content for highlighting as content in excluded from source.
- 3 times for fetching field, highlighting content and highlighting description.
To get more details on highlighting if someone can explain, How highlighting works internally?