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The jvm node stats <endpoint>/_nodes/stats/jvm in elasticsearch suggests that, in the case of an m4.large.elasticsearch instance type, the allocated heap size in 4Gb whereas the capacity of the instance type in 8Gb. Is it possible to increase this allocated heap for the elasticsearch node running on the instance.

Vidhuran
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    You should read this: https://www.elastic.co/guide/en/elasticsearch/guide/current/heap-sizing.html#_give_less_than_half_your_memory_to_lucene – Val Apr 18 '18 at 11:26

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I dont see that as an option or Advanced option in AWS ES CLI reference . AWS calculates that by instance type ( Min(Approx 50% memory , ~ 32 GB)).

Nirmal
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