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doc-exports/docs/css/umn/css_02_0131.html
Zheng, Xiu 5b5876528a CSS UMN 22.5.1 Version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Zheng, Xiu <zhengxiu@huawei.com>
Co-committed-by: Zheng, Xiu <zhengxiu@huawei.com>
2023-03-29 17:17:49 +00:00

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The Average Memory Usage of an Elasticsearch Cluster Reaches 98%

Symptom

The cluster monitoring result shows that the average memory usage of a cluster is 98%. Does it affect cluster performance?

Possible Cause

In an ES cluster, 50% of the memory is occupied by Elasticsearch and the other 50% is used by Lucene to cache files. It is normal that the average memory usage reaches 98%.

Solution

You can monitor the cluster memory usage by checking the maximum JVM heap usage and average JVM heap usage.