Elasticsearch

Elastic Stack Elasticsearch
1

I am new to elasticsearch. Please can you help with my other doubts-

  1. I have daily pushed to ES and the request cache is getting cleared automatically for as low as 1 document also. Can I restrict this from getting cleared?
  2. Where do request_cache, query_cache, and field data cache reside, in heap or ram?
  3. Is there any issue if my ram percentage is showing 99 for the nodes.
  4. Every time when I hit requests are hit both nodes CPU goes 100%, will this impact performance?
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  1. Is it causing issues?
  2. In heap
  3. As in system RAM, no not really. It means things are being cached by the OS outside of heap
  4. Most likely, you'd need to look at hot threads to see what might be causing it
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