# Elasticsearch 5.x issues on linux related to max\_map\_count,file descriptors etc

**URL:** <https://discuss.elastic.co/t/elasticsearch-5-x-issues-on-linux-related-to-max-map-count-file-descriptors-etc/88672>\
**Category:** Elasticsearch\
**Created:** [June 8, 2017, 7:24am UTC](https://discuss.elastic.co/t/elasticsearch-5-x-issues-on-linux-related-to-max-map-count-file-descriptors-etc/88672 "2017-06-08T07:24:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nrmohta](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nrmohta/32/120038_2.png) [@nrmohta](https://discuss.elastic.co/u/nrmohta)\
**Post date:** [June 8, 2017, 7:24am UTC](https://discuss.elastic.co/t/elasticsearch-5-x-issues-on-linux-related-to-max-map-count-file-descriptors-etc/88672/1 "2017-06-08T07:24:23Z")

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Team,

We are installing ES 5.x on linux and facing issues related to below settings.

max\_map\_count - Doc says it should set to 262144([https://www.elastic.co/guide/en/elasticsearch/reference/current/vm-max-map-count.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/vm-max-map-count.html))  
file descriptors - Doc says it should be 65,536 or higher ([https://www.elastic.co/guide/en/elasticsearch/reference/current/file-descriptors.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/file-descriptors.html))  
number of threads - Doc says it should be at least 2048 ([https://www.elastic.co/guide/en/elasticsearch/reference/master/max-number-of-threads.html](https://www.elastic.co/guide/en/elasticsearch/reference/master/max-number-of-threads.html))

We have done these changes as per documentation and things are working fine.

We just want to confirm that all these settings are mandatory OR is there any alternative to it.

Please suggest.

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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:** [July 6, 2017, 7:24am UTC](https://discuss.elastic.co/t/elasticsearch-5-x-issues-on-linux-related-to-max-map-count-file-descriptors-etc/88672/2 "2017-07-06T07:24:54Z")

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Closed on July 6, 2017, 7:24am UTC

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