GV$LOCKS_WITH_COLLISIONS definition in Oracle Database 11.2
GV$LOCKS_WITH_COLLISIONS
select
USERENV('Instance'), -- INST_ID NUMBER
lock_element_addr -- LOCK_ELEMENT_ADDR RAW(8)
from
v$bh
where
(forced_writes + forced_reads) > 10
group by
lock_element_addr
having
count(*) >= 2