How Do I Set the search.max_buckets Parameter for an Elasticsearch Cluster?

Function

By default, CSS allows a maximum of 10,000 buckets to be returned during aggregation. If more than 10,000 buckets need to be returned during aggregation, you can increase the value of search.max_buckets. Note that increasing the value of search.max_buckets also increases the cluster load and memory usage. Therefore, exercise caution when performing this operation.

Solution

PUT _cluster/settings
{
    "persistent": {
        "search.max_buckets": 20000
    }
}