GET /executives/_search?request_cache=true&preference=sa
GET /executives/_search?request_cache=true
When hitting from Kibana both with the same query doesn't make any difference.
Is it true preferences are ignored in elasticsearch?
Welcome to our community! 
It'd be good if you could elaborate on what you mean by that.
Hi @warkolm,
Thanks.
I got the issue. As I had two env (QA and PROD), so in QA we had only 1 node, and prod we had 2 nodes.
So in QA preferences were not making any difference as in the first hit it's getting cached in request cache at that node, so consecutive calls making no difference.
So comparing with prod I can see the difference, as it takes initial two-three calls covering both nodes and now all the consecutive calls are served from request cache...
Please can you help with my other doubts-
- 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?
- Where do request_cache, query_cache, and field data cache reside, in heap or ram?
- Is there any issue if my ram percentage is showing 99 for the nodes.