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zhengxiu 2125539080 css umn 25.1.0 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: zhengxiu <zhengxiu@huawei.com>
Co-committed-by: zhengxiu <zhengxiu@huawei.com>
2025-07-04 09:10:17 +00:00

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What Do I Do If the Average Memory Usage of a CSS 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 Elasticsearch 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.