Deletion is taking long time using forall

Question

Hi,
       i am  inserting and deleting the rows using forall. insert taking less time to inset the rows but while coming to
deletion it is taking more than 5 days long time to delete 18.5 million rows in a table using forall.
the main table having 70 million rows.
the code is..
   FETCH ref_typ  BULK COLLECT INTO l_id_tbl LIMIT 10000;
   begin
    FORALL i in  1..l_id_tbl.COUNT
       INSERT INTO   change_test (id,
                             history,
                             transaction,
                             date)
                     VALUES (seq.nextval,
                             'CHANGE_HIS',
                             l_id_tbl(i),
                             sysdate);
       exception
           when others then
            null;
    end;
    begin
        FoRALL i in 1..l_id_tbl.COUNT
          DELETE FROM change_his
                 where id = l_id_tbl(i);
       exception
           when others then
             null;
   end;
  end loop;
so  please give me a good solution  to delete the rows less than 5 days..

Answer 1

Why are you wanting to do this using BULK COLLECT and FORALL?
Why not just "insert ... select ..." and "delete ..."?
Loading records into expensive PGA memory to insert them back on the database is bound to be slower (and use more server resources) than just doing a straight insert ... select ... statement.
Explain exactly what you are trying to do.
Re: 2. How do I ask a question on the forums?