These settings are available in system.settings and are autogenerated from the ClickHouse snapshot.
memory_overcommit_ratio_denominator
It represents the soft memory limit when the hard limit is reached on the global level. This value is used to compute the overcommit ratio for the query. Zero means skip the query. Read more about memory overcommit.
memory_overcommit_ratio_denominator_for_user
It represents the soft memory limit when the hard limit is reached on the user level. This value is used to compute the overcommit ratio for the query. Zero means skip the query. Read more about memory overcommit.