Available in: Redis Stack
Time complexity: O(1)
Return information about key
filter.
Array reply with information of the filter.
@example
redis> BF.INFO bf
1) Capacity
2) (integer) 1709
3) Size
4) (integer) 2200
5) Number of filters
6) (integer) 1
7) Number of items inserted
8) (integer) 0
9) Expansion rate
10) (integer) 1