# Abnormal of CPU usage of some nodes

**URL:** <https://discuss.elastic.co/t/abnormal-of-cpu-usage-of-some-nodes/177805>\
**Category:** Elasticsearch\
**Created:** [April 22, 2019, 6:56am UTC](https://discuss.elastic.co/t/abnormal-of-cpu-usage-of-some-nodes/177805 "2019-04-22T06:56:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![rui\_dong](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rui_dong/32/42082_2.png) [@rui\_dong](https://discuss.elastic.co/u/rui_dong)\
**Post date:** [April 22, 2019, 6:56am UTC](https://discuss.elastic.co/t/abnormal-of-cpu-usage-of-some-nodes/177805/1 "2019-04-22T06:56:35Z")

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CPU usage on some nodes looks abnormal,

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/7/b/7b7dc47c52325454e8a38c76ceedae88773cca49.png) .  
Other nodes looks normal,  
 ![image](https://us1.discourse-cdn.com/elastic/original/3X/5/9/59ca4d7334a2ca5c0bcb80241f55076faffc4de1.png) .  
Shards and documents are evenly distributed on each node.  
What is the reason for this?

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**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [April 22, 2019, 10:03pm UTC](https://discuss.elastic.co/t/abnormal-of-cpu-usage-of-some-nodes/177805/2 "2019-04-22T22:03:43Z")

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can you explain what you mean with abnormal here? It seems the load is still pretty low during the day and in total does not rise above 25% - nothing I would be worried about.

You can use the [hot threads API](https://www.elastic.co/guide/en/elasticsearch/reference/7.0/cluster-nodes-hot-threads.html) to see what code path is using the most CPU in case it happens, that should give a first a indication.

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**Author:** ![rui\_dong](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rui_dong/32/42082_2.png) [@rui\_dong](https://discuss.elastic.co/u/rui_dong)\
**Post date:** [April 24, 2019, 2:09am UTC](https://discuss.elastic.co/t/abnormal-of-cpu-usage-of-some-nodes/177805/4 "2019-04-24T02:09:16Z")

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> can you explain what you mean with abnormal here?

The CPU utilization curve is jagged.

> It seems the load is still pretty low during the day and in total does not rise above 25% - nothing I would be worried about.

I just think the CPU utilization curve in figure 1 is strange compared to figure 2, although the ES cluster is indeed normal.

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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:** [May 22, 2019, 2:09am UTC](https://discuss.elastic.co/t/abnormal-of-cpu-usage-of-some-nodes/177805/5 "2019-05-22T02:09:19Z")

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Closed on May 22, 2019, 2:09am UTC

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