# What is the most optimal way to get documents by \_id?

**URL:** <https://discuss.elastic.co/t/what-is-the-most-optimal-way-to-get-documents-by-id/369983>\
**Category:** Elastic Search\
**Created:** [November 4, 2024, 6:59am UTC](https://discuss.elastic.co/t/what-is-the-most-optimal-way-to-get-documents-by-id/369983 "2024-11-04T06:59:27Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ananya\_Madhusudan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ananya_madhusudan/32/137533_2.png) [@Ananya\_Madhusudan](https://discuss.elastic.co/u/Ananya_Madhusudan)\
**Post date:** [November 4, 2024, 6:59am UTC](https://discuss.elastic.co/t/what-is-the-most-optimal-way-to-get-documents-by-id/369983/1 "2024-11-04T06:59:27Z")

</div>

I have a cluster with 7 nodes out of which 3 are master nodes. Elasticsearch version is 5.5. I need to fetch documents in bulk by the ids. I'm using the terms query like this

```auto
GET my_index/my_type/_search
{
  "query": {
    "terms": {
      "_id": [
        "123",
        "456"
      ]
    }
  }
}

```

I am passing around 200-250 ids to this query. It's taking around 3-4 seconds to fetch the documents. The index has around 90 million documents. Any ways to fetch the documents faster?

---

<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [November 4, 2024, 7:07am UTC](https://discuss.elastic.co/t/what-is-the-most-optimal-way-to-get-documents-by-id/369983/2 "2024-11-04T07:07:43Z")

</div>

Have you tried the [mget API](https://www.elastic.co/guide/en/elasticsearch/reference/5.5/docs-multi-get.html)?

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<div class="post-metadata">

**Author:** ![Ananya\_Madhusudan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ananya_madhusudan/32/137533_2.png) [@Ananya\_Madhusudan](https://discuss.elastic.co/u/Ananya_Madhusudan)\
**Post date:** [November 4, 2024, 7:20am UTC](https://discuss.elastic.co/t/what-is-the-most-optimal-way-to-get-documents-by-id/369983/3 "2024-11-04T07:20:03Z")

</div>

Yes, I've tried \_mget API, but did not see much improvements.

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<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [November 4, 2024, 7:21am UTC](https://discuss.elastic.co/t/what-is-the-most-optimal-way-to-get-documents-by-id/369983/4 "2024-11-04T07:21:36Z")

</div>

Then I am not aware of any faster way.

> [@Ananya\_Madhusudan](#):
>
> Elasticsearch version is 5.5.

This is very, very old and has been EOL a long time so I would recommend that you upgrade to the latest version.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 2, 2024, 7:22am UTC](https://discuss.elastic.co/t/what-is-the-most-optimal-way-to-get-documents-by-id/369983/5 "2024-12-02T07:22:07Z")

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