Query Q8 (degree of parallelism: 2)

select  s_store_name
      ,sum(ss_net_profit)
 from store_sales
     ,date_dim
     ,store,
     (select ca_zip
     from (
      SELECT substr(ca_zip,1,5) ca_zip
      FROM customer_address
      WHERE substr(ca_zip,1,5) IN (
        '24128','76232','65084','87816','83926','77556','20548','26231','43848','15126',
        '91137','61265','98294','25782','17920','18426','98235','40081','84093','28577',
        '55565','17183','54601','67897','22752','86284','18376','38607','45200','21756',
        '29741','96765','23932','89360','29839','25989','28898','91068','72550','10390',
        '18845','47770','82636','41367','76638','86198','81312','37126','39192','88424',
        '72175','81426','53672','10445','42666','66864','66708','41248','48583','82276',
        '18842','78890','49448','14089','38122','34425','79077','19849','43285','39861',
        '66162','77610','13695','99543','83444','83041','12305','57665','68341','25003',
        '57834','62878','49130','81096','18840','27700','23470','50412','21195','16021',
        '76107','71954','68309','18119','98359','64544','10336','86379','27068','39736',
        '98569','28915','24206','56529','57647','54917','42961','91110','63981','14922',
        '36420','23006','67467','32754','30903','20260','31671','51798','72325','85816',
        '68621','13955','36446','41766','68806','16725','15146','22744','35850','88086',
        '51649','18270','52867','39972','96976','63792','11376','94898','13595','10516',
        '90225','58943','39371','94945','28587','96576','57855','28488','26105','83933',
        '25858','34322','44438','73171','30122','34102','22685','71256','78451','54364',
        '13354','45375','40558','56458','28286','45266','47305','69399','83921','26233',
        '11101','15371','69913','35942','15882','25631','24610','44165','99076','33786',
        '70738','26653','14328','72305','62496','22152','10144','64147','48425','14663',
        '21076','18799','30450','63089','81019','68893','24996','51200','51211','45692',
        '92712','70466','79994','22437','25280','38935','71791','73134','56571','14060',
        '19505','72425','56575','74351','68786','51650','20004','18383','76614','11634',
        '18906','15765','41368','73241','76698','78567','97189','28545','76231','75691',
        '22246','51061','90578','56691','68014','51103','94167','57047','14867','73520',
        '15734','63435','25733','35474','24676','94627','53535','17879','15559','53268',
        '59166','11928','59402','33282','45721','43933','68101','33515','36634','71286',
        '19736','58058','55253','67473','41918','19515','36495','19430','22351','77191',
        '91393','49156','50298','87501','18652','53179','18767','63193','23968','65164',
        '68880','21286','72823','58470','67301','13394','31016','70372','67030','40604',
        '24317','45748','39127','26065','77721','31029','31880','60576','24671','45549',
        '13376','50016','33123','19769','22927','97789','46081','72151','15723','46136',
        '51949','68100','96888','64528','14171','79777','28709','11489','25103','32213',
        '78668','22245','15798','27156','37930','62971','21337','51622','67853','10567',
        '38415','15455','58263','42029','60279','37125','56240','88190','50308','26859',
        '64457','89091','82136','62377','36233','63837','58078','17043','30010','60099',
        '28810','98025','29178','87343','73273','30469','64034','39516','86057','21309',
        '90257','67875','40162','11356','73650','61810','72013','30431','22461','19512',
        '13375','55307','30625','83849','68908','26689','96451','38193','46820','88885',
        '84935','69035','83144','47537','56616','94983','48033','69952','25486','61547',
        '27385','61860','58048','56910','16807','17871','35258','31387','35458','35576')
     intersect
      select ca_zip
      from (SELECT substr(ca_zip,1,5) ca_zip,count(*) cnt
            FROM customer_address, customer
            WHERE ca_address_sk = c_current_addr_sk and
                  c_preferred_cust_flag='Y'
            group by ca_zip
            having count(*) > 10)A1)A2) V1
 where ss_store_sk = s_store_sk
  and ss_sold_date_sk = d_date_sk
  and d_qoy = 2 and d_year = 1998
  and (substr(s_zip,1,2) = substr(V1.ca_zip,1,2))
 group by s_store_name
 order by s_store_name
 limit 100;

Measured execution times:
4000MB: 1364
4000MB-sp(lt0.2/ts5/min10/max100): 1339
8000MB: 1326
8000MB-sp(lt0.2/ts5/min10/max100): 1328