# RAM/ Heap requirements for Elastic stack

**URL:** <https://discuss.elastic.co/t/ram-heap-requirements-for-elastic-stack/250295>\
**Category:** Elasticsearch\
**Created:** [September 29, 2020, 5:59am UTC](https://discuss.elastic.co/t/ram-heap-requirements-for-elastic-stack/250295 "2020-09-29T05:59:46Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Madhu19](https://avatars.discourse-cdn.com/v4/letter/m/ebca7d/32.png) [@Madhu19](https://discuss.elastic.co/u/Madhu19)\
**Post date:** [September 29, 2020, 5:59am UTC](https://discuss.elastic.co/t/ram-heap-requirements-for-elastic-stack/250295/1 "2020-09-29T05:59:46Z")

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I have setup ELK for watching logs on Kibana on Linux redhat-6.8 with 16gb RAM and allocated 6GB for Heap. Index size is 1.5gb per day with 7 days retention period. Observed when I query with very simple patterns on Kibana, Heap is getting filled up and after querying for some time elastic is going down. Could you suggest how to calculate RAM/Heap requirements. I am using elastic 7.9, Kibana 7.9 and logstatsh-6.7.

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**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:** [September 29, 2020, 6:17am UTC](https://discuss.elastic.co/t/ram-heap-requirements-for-elastic-stack/250295/2 "2020-09-29T06:17:44Z")

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That sounds odd as 6GB heap should be more than enough for that amount of data. Please make sure you are using Elasticsearch 7.9.1 or later as [there was a memory leak in 7.9.0](https://github.com/elastic/elasticsearch/issues/61512).

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**Author:** ![Madhu19](https://avatars.discourse-cdn.com/v4/letter/m/ebca7d/32.png) [@Madhu19](https://discuss.elastic.co/u/Madhu19)\
**Post date:** [September 29, 2020, 6:52am UTC](https://discuss.elastic.co/t/ram-heap-requirements-for-elastic-stack/250295/3 "2020-09-29T06:52:12Z")

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> [@Christian\_Dahlqvist](#):
>
> That sounds odd as 6GB heap should be more than enough for that amount of data. Please make sure you are using Elasticsearch 7.9.1 or later as [there was a memory leak in 7.9.0](https://github.com/elastic/elasticsearch/issues/61512).

Thanks for a quick reply, I am using elastic serach 7.9.0 only. Let me try with 7.9.1 and will post the observation with the new version

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 27, 2020, 6:52am UTC](https://discuss.elastic.co/t/ram-heap-requirements-for-elastic-stack/250295/4 "2020-10-27T06:52:43Z")

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