Does the entire elastic index remain in memory in the index servers? Is the index stored in the disk? If the index size increases do I need more RAM or more disk space in the index servers?
We have situation where we are currently using elastic managed cluster, but we need more disk space only not RAM. There is no such option to only increase the disk space. So we are thinking of moving the index to self managed AWS EKS instance so that we can choose a machine. This is to address cost of deployment (we only need more disk space no ram IF the index is stored in the disk).