# Knn\_vectors field understanding

**URL:** <https://discuss.elastic.co/t/knn-vectors-field-understanding/374923>\
**Category:** Elasticsearch\
**Tags:** vector-search\
**Created:** [February 24, 2025, 7:01am UTC](https://discuss.elastic.co/t/knn-vectors-field-understanding/374923 "2025-02-24T07:01:02Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![yli](https://avatars.discourse-cdn.com/v4/letter/y/bbe5ce/32.png) [@yli](https://discuss.elastic.co/u/yli)\
**Post date:** [February 25, 2025, 8:56pm UTC](https://discuss.elastic.co/t/knn-vectors-field-understanding/374923/12 "2025-02-25T20:56:39Z")

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Hi @john-wagster , you could reference the 1st mapping that I posted in [Dense vector field in nested object - Elastic Stack / Elasticsearch - Discuss the Elastic Stack](https://discuss.elastic.co/t/dense-vector-field-in-nested-object/375000), from which I got the index testing results here. The `file_section_text` field should consume the most amount of storage after the `file_section_embedding` field.

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