# Searching less fields result into slower search time

**URL:** <https://discuss.elastic.co/t/searching-less-fields-result-into-slower-search-time/363970>\
**Category:** Elasticsearch\
**Created:** [July 29, 2024, 10:56am UTC](https://discuss.elastic.co/t/searching-less-fields-result-into-slower-search-time/363970 "2024-07-29T10:56:47Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Sajad\_Soltanian](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sajad_soltanian/32/122022_2.png) [@Sajad\_Soltanian](https://discuss.elastic.co/u/Sajad_Soltanian)\
**Post date:** [July 29, 2024, 10:56am UTC](https://discuss.elastic.co/t/searching-less-fields-result-into-slower-search-time/363970/1 "2024-07-29T10:56:47Z")

</div>

Based on the document "[tune for search speed](https://www.elastic.co/guide/en/elasticsearch/reference/current/tune-for-search-speed.html#search-as-few-fields-as-possible)", searching fewer fields should result into faster search response time.

But, actually it does not ....

We have previously used a multiMatch query on 4 fileds. After a reindex we have designed the new index mapping to include an `aggregatedText` field, in which all those 4 fields were copied.

after a month of running the previous query (still a multiMatch on 4 fields) we chaned our query to make a single Match query on the `aggregatedText` field, in the hope of making it faster!

However, unfortunately it gets worse! the response time increased by about 1.5X to 2X.

the only important thing which I found was that the Query and requestCache of the index has been decreased a lot. event after passing many hours of the initial change, they are still much lower than the previous approach.

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/c/d/cdbec896813fe8dcc6a2a975665af155b77b4ef5.png)

this is my index mapping:

```json
{
  "aggregatedText":{
    "type":"text",
    "analyzer":"edge_ngram_index",
    "search_analyzer":"edge_ngram_search"
  },
  "alias":{
    "type":"text",
    "copy_to":[
      "aggregatedText"
    ],
    "analyzer":"edge_ngram_index",
    "search_analyzer":"edge_ngram_search"
  },
  "creationTime":{
    "type":"long"
  },
  "creatorId":{
    "type":"integer"
  },
  "description":{
    "type":"text"
  },
  "documentId":{
    "type":"keyword"
  },
  "groupLicense":{
    "type":"keyword"
  },
  "groupStatus":{
    "type":"keyword"
  },
  "groupType":{
    "type":"keyword"
  },
  "memberCount":{
    "type":"integer"
  },
  "ownerId":{
    "type":"keyword"
  },
  "participantId":{
    "type":"keyword"
  },
  "participantType":{
    "type":"constant_keyword",
    "value":"GROUP"
  },
  "rank":{
    "type":"integer"
  },
  "safe":{
    "type":"keyword"
  },
  "suspendUntil":{
    "type":"integer"
  },
  "title":{
    "type":"text",
    "copy_to":[
      "aggregatedText"
    ],
    "analyzer":"edge_ngram_index",
    "search_analyzer":"edge_ngram_search"
  },
  "verified":{
    "type":"boolean"
  },
  "visibility":{
    "type":"boolean"
  }
}

```