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[DOCS] Re-add network traffic reduction tip to terms lookup docs #83047

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Jan 25, 2022
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[DOCS] Re-add network traffic reduction tip to terms lookup docs #83047

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6 changes: 6 additions & 0 deletions docs/reference/query-dsl/terms-query.asciidoc
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Expand Up @@ -87,10 +87,16 @@ By default, {es} limits the `terms` query to a maximum of 65,536
terms. This includes terms fetched using terms lookup. You can change
this limit using the <<index-max-terms-count, `index.max_terms_count`>> setting.

To reduce network traffic, a terms lookup will fetch the document's values from
a shard on a local data node if possible. If the your terms data is not large,
consider using an index with a single primary shard that's fully replicated
across all applicable data nodes to minimize network traffic.

To perform a terms lookup, use the following parameters.

[[query-dsl-terms-lookup-params]]
====== Terms lookup parameters

`index`::
(Required, string) Name of the index from which to fetch field values.

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