# Elasticsearch htop showing 75 % memory usesd

**URL:** <https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274>\
**Category:** Elasticsearch\
**Created:** [July 31, 2018, 5:19am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274 "2018-07-31T05:19:31Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![Dilip\_Kumar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dilip_kumar/32/15459_2.png) [@Dilip\_Kumar](https://discuss.elastic.co/u/Dilip_Kumar)\
**Post date:** [July 31, 2018, 5:19am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/1 "2018-07-31T05:19:32Z")

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Hi  
i am using es 5.6 with two nodes, first node using 76 % memory (total 16 gb), mlock already true. please suggest to reduce this % memory.

 ![es_memory](https://us1.discourse-cdn.com/elastic/original/3X/8/1/81c972853ecb3d1155ba36cdbe7d6901097cc06f.png)

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 31, 2018, 5:21am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/2 "2018-07-31T05:21:23Z")

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What is your heap set at?  
What does `_cat/nodes` show?

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<div class="post-metadata">

**Author:** ![Dilip\_Kumar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dilip_kumar/32/15459_2.png) [@Dilip\_Kumar](https://discuss.elastic.co/u/Dilip_Kumar)\
**Post date:** [July 31, 2018, 5:31am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/3 "2018-07-31T05:31:32Z")

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Hi warkolm,  
heap size is 8 gb as you can see in image file, and \_cat/nodes resule is 🙂  
192.168.1.xxx 45 96 0 0.07 0.07 0.02 mdi \* node1  
192.168.1.yyy 63 99 0 0.56 0.18 0.11 mdi - node2

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 31, 2018, 5:32am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/4 "2018-07-31T05:32:34Z")

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I can't see that image, it's too small sorry to say.

If you have heap at 8GB then Elasticsearch won't use more than that. What you are seeing is the OS allocating system memory to cache files Elasticsearch is using.

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<div class="post-metadata">

**Author:** ![Dilip\_Kumar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dilip_kumar/32/15459_2.png) [@Dilip\_Kumar](https://discuss.elastic.co/u/Dilip_Kumar)\
**Post date:** [July 31, 2018, 5:33am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/5 "2018-07-31T05:33:37Z")

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ip heap.percent ram.percent cpu load\_1m load\_5m load\_15m node.role master name  
192.168.1.xxx 45 96 0 0.07 0.07 0.02 mdi \* node1  
192.168.1.yyy 63 99 0 0.56 0.18 0.11 mdi - node2

total ram size is 16 gb and heap is 8 gb..(how can i check heap)

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<div class="post-metadata">

**Author:** ![Dilip\_Kumar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dilip_kumar/32/15459_2.png) [@Dilip\_Kumar](https://discuss.elastic.co/u/Dilip_Kumar)\
**Post date:** [July 31, 2018, 5:52am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/6 "2018-07-31T05:52:12Z")

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i have used htop command that's giving =\> showing 75 % memory is used

 ![es_memory](https://us1.discourse-cdn.com/elastic/original/3X/8/1/81c972853ecb3d1155ba36cdbe7d6901097cc06f.png)

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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:** [July 31, 2018, 6:47am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/7 "2018-07-31T06:47:28Z")

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Please don't post images of text as they are hardly readable and not searchable.

Instead paste the text and format it with `</>` icon. Check the preview window.

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<div class="post-metadata">

**Author:** ![Dilip\_Kumar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dilip_kumar/32/15459_2.png) [@Dilip\_Kumar](https://discuss.elastic.co/u/Dilip_Kumar)\
**Post date:** [July 31, 2018, 7:36am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/8 "2018-07-31T07:36:26Z")

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Hi dadoonet,  
i am using htop command from where i can not copy , that's why sending image file..its showing 75 % memory used.. please have a look.. ![htop](https://us1.discourse-cdn.com/elastic/original/3X/f/4/f4a09e308cc12edaf1b04a252d400850c257f34f.gif)

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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:** [August 28, 2018, 7:36am UTC](https://discuss.elastic.co/t/elasticsearch-htop-showing-75-memory-usesd/142274/9 "2018-08-28T07:36:29Z")

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