Help me on the Mview Refresh

Question

The below is the Mview script using:
When i run the script it is taking very long.CAn any one suggest me how I can make THE REFRESH FASTER?
i AM USING 10gR2 Database:
I not able to tune the performance of this mview.I can not go with fast refresh because My query is complex.
CREATE MATERIALIZED VIEW "RM_P01"."BILL_STUDENT_ID_A_CAT_VIEW" ON PREBUILT TABLE WITHOUT REDUCED PRECISION USING INDEX REFRESH FORCE ON DEMAND USING DEFAULT LOCAL ROLLBACK SEGMENT DISABLE QUERY REWRITE
AS
SELECT DISTINCT(sch_cat.STUDENT_ID)
FROM rm_bil_bill sch_cat,
cp_arch_school scl_category ,
rm_arr_ntf arrnft1
WHERE sch_cat.student_id = arrnft1.student_id
AND sch_cat.SCHOOL_CODE = scl_category.SCHOOL_CODE
AND arrnft1.status = 2
AND scl_category.TYPE_CODE = 'A';
CREATE MATERIALIZED VIEW "RM_P01"."BILL_STUDENT_ID_G_CAT_VIEW" ON PREBUILT TABLE WITHOUT REDUCED PRECISION USING INDEX REFRESH FORCE ON DEMAND USING DEFAULT LOCAL ROLLBACK SEGMENT DISABLE QUERY REWRITE
AS
SELECT DISTINCT(sch_cat.STUDENT_ID)
FROM rm_bil_bill sch_cat,
cp_arch_school scl_category ,
rm_arr_ntf arrnft1
WHERE sch_cat.student_id = arrnft1.student_id
AND sch_cat.SCHOOL_CODE = scl_category.SCHOOL_CODE
AND arrnft1.status = 2
AND scl_category.TYPE_CODE = 'G';
CREATE MATERIALIZED VIEW "RM_P01"."BILL_STUDENT_ID_I_CAT_VIEW" ON PREBUILT TABLE WITHOUT REDUCED PRECISION USING INDEX REFRESH FORCE ON DEMAND USING DEFAULT LOCAL ROLLBACK SEGMENT DISABLE QUERY REWRITE
AS
SELECT DISTINCT(sch_cat.STUDENT_ID)
FROM rm_bil_bill sch_cat,
cp_arch_school scl_category ,
rm_arr_ntf arrnft1
WHERE sch_cat.student_id = arrnft1.student_id
AND sch_cat.SCHOOL_CODE = scl_category.SCHOOL_CODE
AND arrnft1.status = 2
AND scl_category.TYPE_CODE = 'I';
CREATE MATERIALIZED VIEW "RM_P01"."RM_BIL_ACCT_MV" ON PREBUILT TABLE WITHOUT REDUCED PRECISION USING INDEX REFRESH FORCE ON DEMAND USING DEFAULT LOCAL ROLLBACK SEGMENT DISABLE QUERY REWRITE
AS
SELECT com.student_id,
cp.level_xcode,
DECODE (SUBSTR (cp.level_xcode, 1, 1), '1', 'P', '3', 'S', 'J' ) aca_level,
balance,
DECODE (SIGN (balance), -1, balance, 0) credit_balance,
cp.school_code
FROM rm_com_stud com,
cp_stud_profile cp,
rm_bil_acct acc
WHERE acc.student_id = com.student_id
AND com.cp_student_id = cp.student_id;
CREATE MATERIALIZED VIEW "RM_P01"."RM_REV_KNOCK_OFF_COLL_DTL_MV" ON PREBUILT TABLE WITHOUT REDUCED PRECISION USING INDEX REFRESH FORCE ON DEMAND USING DEFAULT LOCAL ROLLBACK SEGMENT DISABLE QUERY REWRITE
AS
SELECT d.bill_id,
d.item_id,
d.item_type,
d.net_charges,
d.outstanding_bal,
NVL (d.active_status, 'Y') active_status
FROM rm_rev_knock_off_coll_dtl d,
rm_rev_knock_off_coll m
WHERE d.outstanding_bal > 0
AND d.bill_id =m.bill_id
AND m.bill_month <
(SELECT MAX(a.bill_month) FROM rm_bil_month a
CREATE MATERIALIZED VIEW "RM_P01"."RM_REV_KNOCK_OFF_COLL_MV" ON PREBUILT TABLE WITHOUT REDUCED PRECISION USING INDEX REFRESH FORCE ON DEMAND USING DEFAULT LOCAL ROLLBACK SEGMENT DISABLE QUERY REWRITE
AS
SELECT bill_id,
bill_month,
student_id,
academic_level,
amount_collected,
net_charges,
full_payment_ind,
active_status
FROM rm_rev_knock_off_coll
WHERE amount_collected < net_charges
AND full_payment_ind = 'N'
AND bill_month <
(SELECT MAX(a.bill_month) FROM rm_bil_month a
CREATE MATERIALIZED VIEW "RM_P01"."RM_REV_KOFF_CURR_MV" ON PREBUILT TABLE WITHOUT REDUCED PRECISION USING INDEX REFRESH FORCE ON DEMAND
WITH PRIMARY KEY USING DEFAULT LOCAL ROLLBACK SEGMENT DISABLE QUERY REWRITE AS
SELECT bill_id,
bill_month,
student_id,
academic_level,
amount_collected,
net_charges,
full_payment_ind,
active_status
FROM rm_rev_knock_off_coll
WHERE amount_collected < net_charges
AND full_payment_ind = 'N';
CREATE MATERIALIZED VIEW "RM_P01"."RM_REV_KOFF_DTL_CURR_MV" ON PREBUILT TABLE WITHOUT REDUCED PRECISION USING INDEX REFRESH FORCE ON DEMAND USING DEFAULT LOCAL ROLLBACK SEGMENT DISABLE QUERY REWRITE
AS
SELECT d.bill_id,
d.item_id,
d.item_type,
d.net_charges,
d.outstanding_bal,
NVL (d.active_status, 'Y') active_status
FROM rm_rev_knock_off_coll_dtl d,
rm_rev_knock_off_coll m
WHERE d.outstanding_bal > 0
Regards,
Ashlee

Answer 1

Make sure the querys you're performing on the data collection process are properly tunned.
You could try to extract an "explain plan" for every one, and check if they're using proper indexes and not performing full scans, for example.
There's plenty of docs on the internet if you look for "Explain plan usage".
You can also take snapshots before and after the refresh process and take an AWR report to check what's making the process to take so long.
You can find AWR reports interpretation guides looking for "StatsPack / AWR Survival guide" on the internet.
Good luck.
Regards,
Enric Moya