These settings are available in system.merge_tree_settings and are autogenerated from the ClickHouse snapshot.
number_of_mutations_to_delay
If table has at least that many unfinished mutations, artificially slow down mutations of table. Disabled if set to 0
number_of_mutations_to_throw
If table has at least that many unfinished mutations, throw ‘Too many mutations’ exception. Disabled if set to 0