Search settings

The following expert settings can be set to manage global search and aggregation limits.

indices.query.bool.max_clause_count

(Static, integer) Maximum number of clauses a Lucene BooleanQuery can contain. Defaults to 1024.

This setting limits the number of clauses a Lucene BooleanQuery can have. The default of 1024 is quite high and should normally be sufficient. This limit does not only affect Elasticsearchs bool query, but many other queries are rewritten to Lucene’s BooleanQuery internally. The limit is in place to prevent searches from becoming too large and taking up too much CPU and memory. In case you’re considering increasing this setting, make sure you’ve exhausted all other options to avoid having to do this. Higher values can lead to performance degradations and memory issues, especially in clusters with a high load or few resources.

search.max_buckets

(Dynamic, integer) Maximum number of aggregation buckets allowed in a single response. Defaults to 65,535.

Requests that attempt to return more than this limit will return an error.