Query Q64 (degree of parallelism: 2)

with cs_ui as
 (select cs_item_sk
        ,sum(cs_ext_list_price) as sale,sum(cr_refunded_cash+cr_reversed_charge+cr_store_credit) as refund
  from catalog_sales
      ,catalog_returns
  where cs_item_sk = cr_item_sk
    and cs_order_number = cr_order_number
  group by cs_item_sk
  having sum(cs_ext_list_price)>2*sum(cr_refunded_cash+cr_reversed_charge+cr_store_credit)),
cross_sales as
 (select i_product_name product_name
     ,i_item_sk item_sk
     ,s_store_name store_name
     ,s_zip store_zip
     ,ad1.ca_street_number b_street_number
     ,ad1.ca_street_name b_street_name
     ,ad1.ca_city b_city
     ,ad1.ca_zip b_zip
     ,ad2.ca_street_number c_street_number
     ,ad2.ca_street_name c_street_name
     ,ad2.ca_city c_city
     ,ad2.ca_zip c_zip
     ,d1.d_year as syear
     ,d2.d_year as fsyear
     ,d3.d_year s2year
     ,count(*) cnt
     ,sum(ss_wholesale_cost) s1
     ,sum(ss_list_price) s2
     ,sum(ss_coupon_amt) s3
  FROM   store_sales
        ,store_returns
        ,cs_ui
        ,date_dim d1
        ,date_dim d2
        ,date_dim d3
        ,store
        ,customer
        ,customer_demographics cd1
        ,customer_demographics cd2
        ,promotion
        ,household_demographics hd1
        ,household_demographics hd2
        ,customer_address ad1
        ,customer_address ad2
        ,income_band ib1
        ,income_band ib2
        ,item
  WHERE  ss_store_sk = s_store_sk AND
         ss_sold_date_sk = d1.d_date_sk AND
         ss_customer_sk = c_customer_sk AND
         ss_cdemo_sk= cd1.cd_demo_sk AND
         ss_hdemo_sk = hd1.hd_demo_sk AND
         ss_addr_sk = ad1.ca_address_sk and
         ss_item_sk = i_item_sk and
         ss_item_sk = sr_item_sk and
         ss_ticket_number = sr_ticket_number and
         ss_item_sk = cs_ui.cs_item_sk and
         c_current_cdemo_sk = cd2.cd_demo_sk AND
         c_current_hdemo_sk = hd2.hd_demo_sk AND
         c_current_addr_sk = ad2.ca_address_sk and
         c_first_sales_date_sk = d2.d_date_sk and
         c_first_shipto_date_sk = d3.d_date_sk and
         ss_promo_sk = p_promo_sk and
         hd1.hd_income_band_sk = ib1.ib_income_band_sk and
         hd2.hd_income_band_sk = ib2.ib_income_band_sk and
         cd1.cd_marital_status <> cd2.cd_marital_status and
         i_color in ('purple','burlywood','indian','spring','floral','medium') and
         i_current_price between 64 and 64 + 10 and
         i_current_price between 64 + 1 and 64 + 15
group by i_product_name
       ,i_item_sk
       ,s_store_name
       ,s_zip
       ,ad1.ca_street_number
       ,ad1.ca_street_name
       ,ad1.ca_city
       ,ad1.ca_zip
       ,ad2.ca_street_number
       ,ad2.ca_street_name
       ,ad2.ca_city
       ,ad2.ca_zip
       ,d1.d_year
       ,d2.d_year
       ,d3.d_year
)
select cs1.product_name
     ,cs1.store_name
     ,cs1.store_zip
     ,cs1.b_street_number
     ,cs1.b_street_name
     ,cs1.b_city
     ,cs1.b_zip
     ,cs1.c_street_number
     ,cs1.c_street_name
     ,cs1.c_city
     ,cs1.c_zip
     ,cs1.syear
     ,cs1.cnt
     ,cs1.s1 as s11
     ,cs1.s2 as s21
     ,cs1.s3 as s31
     ,cs2.s1 as s12
     ,cs2.s2 as s22
     ,cs2.s3 as s32
     ,cs2.syear
     ,cs2.cnt
from cross_sales cs1,cross_sales cs2
where cs1.item_sk=cs2.item_sk and
     cs1.syear = 1999 and
     cs2.syear = 1999 + 1 and
     cs2.cnt <= cs1.cnt and
     cs1.store_name = cs2.store_name and
     cs1.store_zip = cs2.store_zip
order by cs1.product_name
       ,cs1.store_name
       ,cs2.cnt
       ,cs1.s1
       ,cs2.s1;

Measured execution times:
4000MB: 1725
4000MB-sp(lt0.2/ts5/min10/max100): 1769
8000MB: 1714
8000MB-sp(lt0.2/ts5/min10/max100): 1746