# What is there in my JVM Heap

**URL:** <https://discuss.elastic.co/t/what-is-there-in-my-jvm-heap/194998>\
**Category:** Elasticsearch\
**Created:** [August 13, 2019, 9:38am UTC](https://discuss.elastic.co/t/what-is-there-in-my-jvm-heap/194998 "2019-08-13T09:38:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rakesh4](https://avatars.discourse-cdn.com/v4/letter/r/eb8c5e/32.png) [@Rakesh4](https://discuss.elastic.co/u/Rakesh4)\
**Post date:** [August 13, 2019, 9:38am UTC](https://discuss.elastic.co/t/what-is-there-in-my-jvm-heap/194998/1 "2019-08-13T09:38:33Z")

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Hi,  
My analysis says,  
elastic search holds memory for segments ( cache memory no in heap) ,  
fields mappings ( in Heap) and some shard structure.

Can you please suggest is there any way to know what is there in my Heap is it field data or segments ?  
What elastic search hold in memory and heap separately ?  
Any suggestion ?

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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:** [September 10, 2019, 9:49am UTC](https://discuss.elastic.co/t/what-is-there-in-my-jvm-heap/194998/2 "2019-09-10T09:49:49Z")

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