Determinng how many times an index was used

Question

DB Version:10gR2
Is there a way i could determine how many times an index was used? i couldn't find any related columns in user_indexes.

Answer 1

I don't think you can count how many times it's been used. However, you can check whether the index is used or not over a given period by looking at v$object_usage view.
However, you do have to monitor the index usage by issuing
alter index index_name monitoring usage;
However, there is a problem with this view in that the username is always the user who set monitoring on the index.
Solution from metalink is:
select
io.name, t.name,
decode(bitand(i.flags, 65536), 0, 'NO', 'YES'),
decode(bitand(ou.flags, 1), 0, 'NO', 'YES'),
u.start_monitoring,
ou.end_monitoring
from
sys.obj$ io,
sys.obj$ t,
sys.ind$ i,
sys.object_usage ou
where
io.owner# = userenv('SCHEMAID')
and
i.obj# = ou.obj#
and
io.obj# = ou.obj#
and
t.obj# = i.bo#;