The person sitting there has no knowledge in db. There is no connectivity too.

After analyzing the db there, with ts and df s
i have done the following things,, and the Problem is solved.

Dropped the previous rollback segments which grown big,,1gb plus,
it is a small database of size 5 gb.

Created another Temp ts and assigned that .//
Previous temp ts grown to 1gb +//

Thanks all for your valuable replies.