I have a big table (7 million rows) and the blevel is 3 after I did analyze index index_name compute statistics; I then rebuilt the index by alter index index_name rebuild; When I analyzed again and checked teh blevel from user_indexes, it is still the same, 3. Why is the number not coming down? Does this have something to do with the large size of the table? If so, would the rule of thumb that blevel should be less than 4 still hold true for huge tables?