I read somewhere that the ES_HEAP_SIZE is best to be less than 31G, in this case JVM can use an 32 bit number to address memory locations. If my server have about 64G ram. This seems a perfect. But what If I have a server with 128G RAM and sufficient CPU's. Which configuration is better a) two nodes on server each with ES_HEAP_SIZE say about 31G. b) one node on the server with ES_HEAP_SIZE say 64G. Thanks,
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