Hi I have been working on tuning this report for a while, still couldn’t make it run fast within 1 minute. The MDX query (see below) runs 15 seconds in SSAS but took 8 minutes to create a report (+ 6 million rows). To isolate the issue, I removed almost every column and row and column group except this main dataset, but duration time does not decrease.I really appreciate your help!----------------------------------------------------------------------------------------------------------------------------------------------------------------WITH MEMBER [Measures].[Group Name] AS [Question].[Group - Translated Question].CurrentMember.Parent.NAME MEMBER [Measures].[LocationMemberName] AS IIF( [Location Rated].[Location - Wing].CurrentMember.LEVEL.Name = "Wing Name", [Location Rated].[Location - Wing].CurrentMember.NAME + " Building", [Location Rated].[Location - Wing].CurrentMember.NAME ) MEMBER [Measures].[NSS] AS (KPIValue("NPS")) MEMBER [Measures].[Primary Top 2] AS (KPIValue("Top 2 Boxes")) MEMBER [Measures].[Primary Bottom 4] AS (KPIValue("Bottom 4 Boxes")) MEMBER [Measures].[Primary Response Count] AS ([Measures].[Response Count]) MEMBER [MinDate] AS DESCENDANTS([Tran Date].[Year - Quarter - Month - Date].currentmember, [Tran Date].[Year - Quarter - Month - Date].[Date]).ITEM(0).PROPERTIES(("KEY"), FORMAT_STRING= "MM/DD/YYYY" MEMBER [MaxDate] AS TAIL (DESCENDANTS([Tran Date].[Year - Quarter - Month - Date].currentmember,[Tran Date].[Year - Quarter - Month - Date].[Date]),1).ITME(0).PROPERTIES("KEY"), FORMAT_STRING = "MM/DD/YYYY"SET [Parameter1] AS NONEMPTY(EXCEPT([Patron].[Numberof Stays].children,[Patron].[Numberof Stays].&[No Response]),[Measures].[NSS]) MEMBER [Measures].[Primary Segment] AS([Patron].[Numberof Stays].currentmember.PROPERTIES ('Caption')) SET [Parameter2] AS NONEMPTY(EXCEPT([Visit].[Check In Location].children,[Visit].[Check In Location].&[No Response]),[Measures].[NSS]) MEMBER [Measures].[Secondary Segment] AS ([Visit].[Check In Location].currentmember.PROPERTIES('Caption')) SET [Column List] AS NONEMPTY({[Tran Date].[Year - Quarter - Month - Date].[Month].allmembers}[Measures].[NSS]) MEMBER [Breakout] AS[Tran Date].[Year - Quarter - Month - Date].currentmember.NAME SELECT NON EMPTY {[Measures].[Primary Segment], [Measures].[Secondary Segment], [Measures].[Group Name], [Measures].[LocationMemberName], [Measures].[NSS], [Measures].[Primary Top 2], [Measures].[Primary Bottom 4], [Measures].[Primary Response Count], [Measures].[MinDate], [Measures].[MaxDate], [Measures].[Breakout]} ON COLUMNS , NON EMPTY {([Parameter1]* [Parameter2]* {STRTOSET("{[Location Rated].[Location - Wing].[Property Name].&[Building1],[Location Rated].[Location - Wing].[Property Name].&[Building2], [Location Rated].[Location - Wing].[All]}", CONSTRAINED)} * [Question].[Classification Name].[Classification Name].ALLMEMBERS* [Column List]* [Question].[Group - Translated Question].[Question].ALLMEMBERS* [Question].[MAIN Question].[All].CHILDREN) } ON ROWS FROM ( SELECT [Score].[Use In Calculations Ind].&[True] ON COLUMNS FROM ( SELECT ( { [Question].[Question Type].&[Rated Question] } ) ON COLUMNS FROM (SELECT(UNION({[Question].[Classification Name].&[Overall Experience]}, STRTOSET("[Question].[Classification Name].[All]", CONSTRAINED)))ON COLUMNS FROM (SELECT (UNION( [Question].[Group - Translated Question].[Group Name].&[Overall Experience].CHILDREN, STRTOSET("{ [Question].[Group - Translated Question].[Group Name].&[Theatre Box Office], [Question].[Group - Translated Question].[Group Name].&[Restaurant Row], [Question].[Group - Translated Question].[Group Name].&[Pool Deck], [Question].[Group - Translated Question].[Group Name].&[Banquet Services], [Question].[Group - Translated Question].[Group Name].&[Connections - Motivations], [Question].[Group - Translated Question].[Group Name].&[Overall Experience], [Question].[Group - Translated Question].[Group Name].&[Staff Exceed Expectations]} ", CONSTRAINED)), {[Tran Date].[Year - Quarter - Month - Date].[Date].&[2013-09-09T00:00:00]: [Tran Date].[Year - Quarter - Month - Date].[Date].&[2014-10-09T00:00:00]}) ON COLUMNS FROM [FactTable))))
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