Answer by AHT for Elastic Search using a lot of memory despite low heap size
I would recommend you check the documentation regarding heap size Anyway, I think it is absolutely recommended to not assign less than 1GB memory to elasticsearch service on a production server.
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-Xmx512m This setting only limits the RAM that the Elasticsearch Application (inside your JVM) is using, it does not limit the amount of RAM that the JVM needs for overhead. The same goes for mlockall...
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Elastic Search using a lot of memory despite low heap size
We have configured Elastic Search JVM options /etc/elasticsearch/jvm.options to use a fixed heap size of -Xms512m -Xmx512m This can be confirmed as working when checking the Elastic Search process:...
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