# Hash Policy

The following table provides additional information on the members of this template class.
Member | Description
--- | ---
float load_factor() const | Returns: Average number of elements per bucket.
float max_load_factor() const | Returns: Maximum size of a bucket. If insertion of an item causes a bucket to be bigger, the implementation may repartition or increase the number of buckets.
void max_load_factor(float z) | Set maximum size for a bucket to `z`.
void rehash(size_type n) | Requirements: `n` must be a power of two. Effects: No effect if current number of buckets is at least `n`. Otherwise increases number of buckets to `n`.

Parent topic: concurrent_unordered_map and concurrent_unordered_multimap Template Classes