# Need Suggestion on Elastic search structure Capacity

**URL:** https://discuss.elastic.co/t/need-suggestion-on-elastic-search-structure-capacity/103859
**Category:** Elasticsearch
**Created:** [October 13, 2017, 9:00am UTC](https://discuss.elastic.co/t/need-suggestion-on-elastic-search-structure-capacity/103859 "2017-10-13T09:00:04Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![amitshar04](https://avatars.discourse-cdn.com/v4/letter/a/b19c9b/32.png) [@amitshar04](https://discuss.elastic.co/u/amitshar04)
#### Post date: [October 13, 2017, 9:00am UTC](https://discuss.elastic.co/t/need-suggestion-on-elastic-search-structure-capacity/103859/1 "2017-10-13T09:00:04Z")

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Hi,

What should be the capacity of master node if i am using 2 Server as data node & each node having capacity of 128 Gb / 32 Core.

Thanks,  
Amit

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### 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: [October 13, 2017, 9:33am UTC](https://discuss.elastic.co/t/need-suggestion-on-elastic-search-structure-capacity/103859/2 "2017-10-13T09:33:06Z")

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At most 30gb for the HEAP. But monitor and test as you might need less HEAP. This will give even more to the OS FS Cache.

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### Author: ![amitshar04](https://avatars.discourse-cdn.com/v4/letter/a/b19c9b/32.png) [@amitshar04](https://discuss.elastic.co/u/amitshar04)
#### Post date: [October 13, 2017, 5:45pm UTC](https://discuss.elastic.co/t/need-suggestion-on-elastic-search-structure-capacity/103859/3 "2017-10-13T17:45:33Z")

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Thanks 🙂

confirming again.

Elasticsearch master - 64 GB with 30 + GB heap  
Elasticsearch node1 - 128 GB with 100 + GB heap  
Elasticsearch node2 - 128 GB with 100 + GB heap

is this right ?

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<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: [October 13, 2017, 6:21pm UTC](https://discuss.elastic.co/t/need-suggestion-on-elastic-search-structure-capacity/103859/4 "2017-10-13T18:21:09Z")

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No more than 31gb heap.

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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: [November 10, 2017, 6:21pm UTC](https://discuss.elastic.co/t/need-suggestion-on-elastic-search-structure-capacity/103859/5 "2017-11-10T18:21:31Z")

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