# Query\_string search exact phrase causes performance issues

**URL:** <https://discuss.elastic.co/t/query-string-search-exact-phrase-causes-performance-issues/335055>\
**Category:** Elasticsearch\
**Created:** [June 2, 2023, 8:30am UTC](https://discuss.elastic.co/t/query-string-search-exact-phrase-causes-performance-issues/335055 "2023-06-02T08:30:47Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Sandeep\_Raju](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@Sandeep\_Raju](https://discuss.elastic.co/u/Sandeep_Raju)\
**Post date:** [June 2, 2023, 8:30am UTC](https://discuss.elastic.co/t/query-string-search-exact-phrase-causes-performance-issues/335055/1 "2023-06-02T08:30:47Z")

</div>

Hi all,

When I make query\_string search exact phrase in Elasticsearch,

```auto
POST /myindex_*/_search
{
    "query": {
      "query_string": {
        "query": "\"Classe A\""
     }
}

```

The query is run and shows hits, but shows below performance issue:

`"failed to create query: field expansion for [*] matches too many fields, limit: 1024, got: 1779"`

If I increase field limit, it may again cause performance issue.

Anyway we can overcome this issue for the query.

---

<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [June 2, 2023, 8:53am UTC](https://discuss.elastic.co/t/query-string-search-exact-phrase-causes-performance-issues/335055/2 "2023-06-02T08:53:03Z")

</div>

Most likely you have a lot of fields in your mapping, right?  
May be search within the needed fields only?

---

<div class="post-metadata">

**Author:** ![Sandeep\_Raju](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@Sandeep\_Raju](https://discuss.elastic.co/u/Sandeep_Raju)\
**Post date:** [June 2, 2023, 9:11am UTC](https://discuss.elastic.co/t/query-string-search-exact-phrase-causes-performance-issues/335055/3 "2023-06-02T09:11:11Z")

</div>

I have only 2 indices for an index pattern and both have 1500 + fields.

---

<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [June 2, 2023, 10:44am UTC](https://discuss.elastic.co/t/query-string-search-exact-phrase-causes-performance-issues/335055/4 "2023-06-02T10:44:22Z")

</div>

Which is more than the default allowed : 1024.

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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:** [June 30, 2023, 10:44am UTC](https://discuss.elastic.co/t/query-string-search-exact-phrase-causes-performance-issues/335055/5 "2023-06-30T10:44:57Z")

</div>

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