I am using ES 7.3 with Kibana.
I encountered this error in a few visualisations and I cannot figure out what is wrong.
For example - I am trying to visual a time line of Bytes read/write per host.
But I am getting this error :
org.elasticsearch.search.aggregations.MultiBucketConsumerService$TooManyBucketsException: 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.
I tried increasing the max buckets to 12000, but it still fails.
What I know -
- Multiple indices are searched as my index pattern covers a few indices and not just one.
- If I reduce the time filter the visualisation works. e.g. from 'Today' to 'Last 1 hour'
So, the questions are:
What is wrong?
What should I check?
How should I fix this?
I read a few previous discussions, but couldn't find any ones that could help me.