Heap size for elastic nodes when multiple nodes run on a single machine


I have a 16GB RAM and running two elastic processes (nodes) on it.

According to documentation, it say to allocate half memory to lucene. So according to it,

  1. Should i allocate half of memory to all elastic processes combined i.e 4g ram for each process so that 8g is used for both processees?

2. Should i allocate half of memory to a single process? i.e 8g for each elastic node



You should not run more than one elasticsearch instance per node.

So one single node with 8gb HEAP.

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