Oracle buffer busy waits...let's debug it

This post can be longer indeed, but let's from scratch. First, identify from v$session_waits if there're buffer busy waits with this query:

select
   p1 "File ID",
   p2 "Block ID",
   p3 "Reason ID"
from
   v$session_wait
where
   event = 'buffer busy waits';

Now, you can find file id and block id of buffer busy. Using the following statement you can find the object belonging to waits:

select 
   owner,
   segment_name,
   segment_type
from 
   dba_extents
where 
   file_id = &P1
and 
  &P2 between block_id and block_id + blocks -1;

Now you have to find which session is using the object incriminated.