Hi

In 9i you have something called as v$object_useage..through which you can monitor the index useage to a certain extent..

alter index my_index monitoring useage;

it cant tell us how many times a index has been used or nor hwne it was used..

The used column in v$object_useage will have an yes if the index was used since we turned on monitoring

But read the oracle docs before using it..

regards
Hrishy