#81525 indicates that the indices.query.bool.max_clause_count setting was deprecated in 8.0.0-rc2 and 8.1. Now, the max clause count is set dynamically and configured based off of the available heap and the size of the thread pool.

The description for this setting in the Search settings topic will likely need to be updated to reflect these changes. Possibly the deprecations section of the 8.1 release notes as well.

Related issue:

• IndexSearcher max clause count #46433