Massive delete

Question

Hi ,
My scnerion is like this ,the tagte table called tab a with different load sources i.e 'BS','FI' ,'CC' but load source with CC has huge volume of data in the target table when run the consecutive i.e. 2nd run delete existing records based on load source and re insert into taget with respective load source.when executing the below procedure in production ,it takes 5 to 6 hours to delete 5million records and insert with 6 million records for CC.Is there anyway to optimize below code to improve the performance.
cannot do the following
can't use temp table to hold the data and truncate the base table because client will not allow that.
CREATE OR REPLACE PROCEDURE P11(LOAD_SRC IN VARCHAR2)IS
I_COUNT NUMBER;
CUSOR C1 IS SELECT ROWID FROM TAB A WHERE LOADSRC=LOAD_SRC;
BEGIN
FOR REC IN C1
LOOP DELETE FROM TAB A WHERE A.ROWID=REC.ROW_ID;
IF (MOD(I_COUNT ,10000)=0) THEN
COMMIT;
END IF;
END LOOP;
END;
Thanks and Regards,
MM

Answer 1

Hi Nicolas
Please give me the example of truncate a partition (for a LOADSRC value) instead of use any delete statement.I know that combination of huge selects and frequent commits could lead to take long long time and Instead of select whole set of records ,Is it possible to select only once of one record when time of cursor opening because the code I posted keep on using since long and did not get any issues because they dealt with less volume of data.
Cheers
MM