I'm getting this error in our some of our Grafana panels now after updating to 7.4 from 6.8:
type:"too_many_buckets_exception" reason:"Trying to create too many buckets. Must be less than or equal to:  but was . This limit can be set by changing the [search.max_buckets] cluster level setting."
Elastic ref says:
The maximum number of buckets allowed in a single response is limited by a dynamic cluster setting namedsearch.max_buckets
. It defaults to 10,000, requests that try to return more than the limit will fail with an exception
Seeing this issue also after updating to 7.x, mentioning: 'So be careful about making the limit too high'
What might be considered too high, when nodes trips over with OOM or...?