Is there any problem that set ES heap size to 64G?

Elastic Stack Elasticsearch
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My machine has 512G memory, and i only need 2 ES nodes( 2 shards is enough for my index).
So, is there any problem that set ES heap size to 64G or more bigger?

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In 8.X not so much, but it's probably not a good idea.

Just run multiple smaller nodes on the host using docker.

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