# Performance impact

**URL:** <https://discuss.elastic.co/t/performance-impact/63025>\
**Category:** Elasticsearch\
**Created:** [October 14, 2016, 7:03am UTC](https://discuss.elastic.co/t/performance-impact/63025 "2016-10-14T07:03:40Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![banu](https://avatars.discourse-cdn.com/v4/letter/b/2acd7d/32.png) [@banu](https://discuss.elastic.co/u/banu)\
**Post date:** [October 14, 2016, 7:03am UTC](https://discuss.elastic.co/t/performance-impact/63025/1 "2016-10-14T07:03:40Z")

</div>

How to achieve refresh in elasticsearch without performance impact.?

how to achieve Number of threads running and refresh elastic search without any performance impact.?

---

<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:** [October 14, 2016, 7:13am UTC](https://discuss.elastic.co/t/performance-impact/63025/2 "2016-10-14T07:13:22Z")

</div>

A refresh results in Lucene segments being generated, which allows the data to be searched. This is an expensive operation, and will affect performance if done frequently. If there was a way to do this without performance impact I bet it would be done more frequently by default.

---

<div class="post-metadata">

**Author:** ![banu](https://avatars.discourse-cdn.com/v4/letter/b/2acd7d/32.png) [@banu](https://discuss.elastic.co/u/banu)\
**Post date:** [October 14, 2016, 7:36am UTC](https://discuss.elastic.co/t/performance-impact/63025/3 "2016-10-14T07:36:35Z")

</div>

how to achieve Number of threads running and refresh elastic search without any performance impact.?

---

<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:** [October 14, 2016, 8:22am UTC](https://discuss.elastic.co/t/performance-impact/63025/4 "2016-10-14T08:22:55Z")

</div>

Issuing refreshes frequently in Elasticsearch will have an impact on performance. There is no way to avoid that.

If this does not answer your question, please clarify your question.

---

<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:** [July 5, 2017, 10:12pm UTC](https://discuss.elastic.co/t/performance-impact/63025/5 "2017-07-05T22:12:23Z")

</div>

Closed on July 5, 2017, 10:12pm UTC