这是我的问题。我们的Sharepoint 2007网站上的所有页面都由Web部件呈现。 Web部件从列表中提取数据并在页面上显示它们。在过去的几周里，性能已经受到影响，以至于单个页面可能需要一分半钟才能加载。在检查日志时，似乎对SQL数据库的查询每个大约需要3到5秒，而实际查询是巨大的。包含数据的列表包含100到2000个列表项。我知道2000年很多，但我们过去从未有过这么糟糕的表现。我将发布一个SQL查询的示例，并为自己提供支持，这非常糟糕。注意过多的JOIN语句;我在这一个中算了34个：
EXEC Sp_executesql
N' SELECT t16.*, t18.[MetaInfo] AS c30, t17.[ntext7], t17.[ntext9], t17.[ntext3], t17.[ntext1], t17.[ntext4], t17.[ntext6], t17.[ntext8], t17.[ntext2], t17.[ntext5], t17.[ntext10] FROM (SELECT DISTINCT t14.*, t15.[tp_Ordinal] , t2.[tp_ID] AS c4, t3.[tp_ID] AS c6, t4.[tp_ID] AS c7, t6.[tp_ID] AS c11, t7.[tp_ID] AS c12, t8.[tp_ID] AS c13, t9.[tp_ID] AS c14, t10.[tp_ID] AS c15, t24.[nvarchar1] AS c13c10, t22.[nvarchar1] AS c11c10, t19.[nvarchar1] AS c4c5, t26.[nvarchar1] AS c15c5, t23.[nvarchar1] AS c12c8, t21.[nvarchar1] AS c7c8, t25.[nvarchar1] AS c14c5, t20.[nvarchar1] AS c6c5 FROM ( SELECT TOP 2147483648 t1.[Type] AS c0,UserDataVersioned.[tp_ModerationStatus],UserDataVersioned.[nvarchar1],UserDataVersioned.[nvarchar21],UserDataVersioned.[tp_Version],UserDataVersioned.[int2],t13.[nvarchar1] AS c24c19,t1.[TimeLastModified] AS c28,UserDataVersioned.[tp_HasCopyDestinations],UserDataVersioned.[nvarchar12],UserDataVersioned.[int7],UserDataVersioned.[nvarchar17],t12.[nvarchar4] AS c18c21,t13.[nvarchar5] AS c24c22,UserDataVersioned.[tp_WorkflowInstanceID],UserDataVersioned.[tp_Level],UserDataVersioned.[tp_DirName],t1.[ScopeId] AS c3,UserDataVersioned.[nvarchar5],UserDataVersioned.[nvarchar20],UserDataVersioned.[tp_CalculatedVersion],UserDataVersioned.[int1],UserDataVersioned.[tp_Author],UserDataVersioned.[tp_Editor],UserDataVersioned.[tp_UIVersion],UserDataVersioned.[tp_GUID],UserDataVersioned.[tp_ContentTypeId],UserDataVersioned.[nvarchar11],UserDataVersioned.[nvarchar16],UserDataVersioned.[int6],t1.[TimeCreated] AS c26,CASE WHEN DATALENGTH(t1.DirName) = 0 THEN t1.LeafName WHEN DATALENGTH(t1.LeafName) = 0 THEN t1.DirName ELSE t1.DirName + N''/'' + t1.LeafName END AS c1,t13.[tp_ID] AS c24c20,UserDataVersioned.[tp_WorkflowVersion],UserDataVersioned.[tp_IsCurrentVersion],UserDataVersioned.[nvarchar4],UserDataVersioned.[nvarchar9],t1.[ProgId] AS c29,UserDataVersioned.[tp_SiteId],UserDataVersioned.[int5],UserDataVersioned.[nvarchar10],UserDataVersioned.[nvarchar15],t12.[nvarchar1] AS c18c19,t12.[nvarchar5] AS c18c22,t13.[tp_Created] AS c24c23,UserDataVersioned.[tp_CopySource],UserDataVersioned.[tp_ContentType],t13.[nvarchar3] AS c24c31,UserDataVersioned.[tp_HasAttachment],UserDataVersioned.[tp_InstanceID],UserDataVersioned.[tp_ItemOrder],UserDataVersioned.[tp_Created],UserDataVersioned.[tp_ID],UserDataVersioned.[nvarchar3],UserDataVersioned.[nvarchar8],UserDataVersioned.[nvarchar23],UserDataVersioned.[tp_LeafName],UserDataVersioned.[int4],t5.[nvarchar1] AS c9c10,UserDataVersioned.[nvarchar14],UserDataVersioned.[tp_UIVersionString],t1.[DirName] AS c27,t1.[Id] AS c2,UserDataVersioned.[tp_DeleteTransactionId],UserDataVersioned.[nvarchar19],UserDataVersioned.[int9],t11.[nvarchar4] AS c16c17,t12.[tp_ID] AS c18c20,t13.[nvarchar4] AS c24c21,UserDataVersioned.[nvarchar2],UserDataVersioned.[nvarchar7],UserDataVersioned.[float1],UserDataVersioned.[nvarchar22],UserDataVersioned.[tp_Modified],UserDataVersioned.[int3],UserDataVersioned.[nvarchar13],UserDataVersioned.[int10],t1.[LeafName] AS c25,UserDataVersioned.[nvarchar18],UserDataVersioned.[int8],t12.[tp_Created] AS c18c23,t12.[nvarchar3] AS c18c31,UserDataVersioned.[nvarchar6] FROM UserDataVersioned INNER JOIN Docs AS t1 WITH(NOLOCK) ON ( 1 = 1 AND UserDataVersioned.[tp_RowOrdinal] = 0 AND t1.SiteId = UserDataVersioned.tp_SiteId AND t1.SiteId = @L2 AND t1.DirName = UserDataVersioned.tp_DirName AND t1.LeafName = UserDataVersioned.tp_LeafName AND t1.IsCurrentVersion = 1 AND (UserDataVersioned.tp_Level = 255 AND t1.LTCheckoutUserId =@IU OR (UserDataVersioned.tp_Level = 1 OR UserDataVersioned.tp_Level = 2 AND (UserDataVersioned.tp_DraftOwnerId = @IU OR t1.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) ) AND (t1.ScopeId=@L3) AND UserDataVersioned.tp_ListId = @L4) LEFT OUTER JOIN (SELECT * FROM UserData AS t5_u WITH(NOLOCK) INNER JOIN Docs AS t5_d WITH(NOLOCK) ON (t5_d.DoclibRowId = t5_u.tp_ID AND t5_d.SiteId = t5_u.tp_SiteId AND t5_d.SiteId = @L2 AND t5_d.DirName = t5_u.tp_DirName AND t5_d.LeafName = t5_u.tp_LeafName AND t5_d.Level = t5_u.tp_Level AND (t5_u.tp_Level = 255 AND t5_d.LTCheckoutUserId =@IU OR (t5_u.tp_Level = 1 AND (t5_u.tp_DraftOwnerId IS NULL OR (t5_u.tp_DraftOwnerId <>@IU AND t5_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t5_u.tp_Level = 2 AND (t5_u.tp_DraftOwnerId = @IU OR t5_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t5_d.LTCheckoutUserId IS NULL OR t5_d.LTCheckoutUserId <> @IU )) AND (t5_d.ScopeId=@L3))) AS t5 ON (UserDataVersioned.[int4]=t5.[tp_ID] AND UserDataVersioned.[tp_RowOrdinal] = 0 AND t5.[tp_RowOrdinal] = 0 AND t5.tp_ListId = @L4 AND UserDataVersioned.tp_ListId = @L4) LEFT OUTER JOIN (SELECT * FROM UserData AS t11_u WITH(NOLOCK) INNER JOIN Docs AS t11_d WITH(NOLOCK) ON (t11_d.DoclibRowId = t11_u.tp_ID AND t11_d.SiteId = t11_u.tp_SiteId AND t11_d.SiteId = @L2 AND t11_d.DirName = t11_u.tp_DirName AND t11_d.LeafName = t11_u.tp_LeafName AND t11_d.Level = t11_u.tp_Level AND (t11_u.tp_Level = 255 AND t11_d.LTCheckoutUserId =@IU OR (t11_u.tp_Level = 1 AND (t11_u.tp_DraftOwnerId IS NULL OR (t11_u.tp_DraftOwnerId <>@IU AND t11_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t11_u.tp_Level = 2 AND (t11_u.tp_DraftOwnerId = @IU OR t11_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t11_d.LTCheckoutUserId IS NULL OR t11_d.LTCheckoutUserId <> @IU )) AND (t11_d.ScopeId=@L3))) AS t11 ON (UserDataVersioned.[int10]=t11.[tp_ID] AND UserDataVersioned.[tp_RowOrdinal] = 0 AND t11.[tp_RowOrdinal] = 0 AND t11.tp_ListId = @L4 AND UserDataVersioned.tp_ListId = @L4) LEFT OUTER JOIN AllUserData AS t12 WITH(NOLOCK, INDEX=AllUserData_PK) ON (UserDataVersioned.[tp_Author]=t12.[tp_ID] AND UserDataVersioned.[tp_RowOrdinal] = 0 AND t12.[tp_RowOrdinal] = 0 AND ( (t12.tp_IsCurrent = 1) ) AND t12.[tp_CalculatedVersion] = 0 AND t12.[tp_DeleteTransactionId] = 0x AND t12.tp_ListId = @L5 AND UserDataVersioned.tp_ListId = @L4) LEFT OUTER JOIN AllUserData AS t13 WITH(NOLOCK, INDEX=AllUserData_PK) ON (UserDataVersioned.[tp_Editor]=t13.[tp_ID] AND UserDataVersioned.[tp_RowOrdinal] = 0 AND t13.[tp_RowOrdinal] = 0 AND ( (t13.tp_IsCurrent = 1) ) AND t13.[tp_CalculatedVersion] = 0 AND t13.[tp_DeleteTransactionId] = 0x AND t13.tp_ListId = @L5 AND UserDataVersioned.tp_ListId = @L4) WHERE (UserDataVersioned.[tp_ID] = @I6P) AND t1.SiteId=@L2 AND (t1.DirName=@DN OR t1.DirName LIKE @DNEL+N''/%'') ORDER BY UserDataVersioned.[tp_UIVersion] Desc,UserDataVersioned.[tp_ID] Asc ) AS t14 LEFT OUTER JOIN UserDataJunctionsVersioned AS t15 ON t14.[tp_SiteId] = t15.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t15.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t15.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t15.[tp_DirName] AND t14.[tp_LeafName] = t15.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t15.[tp_CalculatedVersion] AND t14.[tp_Level] = t15.[tp_Level] LEFT OUTER JOIN UserDataJunctionsVersioned AS t2 ON t14.[tp_SiteId] = t2.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t2.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t2.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t2.[tp_DirName] AND t14.[tp_LeafName] = t2.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t2.[tp_CalculatedVersion] AND t14.[tp_Level] = t2.[tp_Level] AND t15.[tp_Ordinal] = t2.[tp_Ordinal] AND t2.[tp_FieldId] = ''{2e286cc1-f309-4b61-9a9e-efd7bfa5fd61}'' LEFT OUTER JOIN UserDataJunctionsVersioned AS t3 ON t14.[tp_SiteId] = t3.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t3.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t3.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t3.[tp_DirName] AND t14.[tp_LeafName] = t3.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t3.[tp_CalculatedVersion] AND t14.[tp_Level] = t3.[tp_Level] AND t15.[tp_Ordinal] = t3.[tp_Ordinal] AND t3.[tp_FieldId] = ''{48ce2774-348c-46fc-8863-b050f78d9fe6}'' LEFT OUTER JOIN UserDataJunctionsVersioned AS t4 ON t14.[tp_SiteId] = t4.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t4.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t4.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t4.[tp_DirName] AND t14.[tp_LeafName] = t4.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t4.[tp_CalculatedVersion] AND t14.[tp_Level] = t4.[tp_Level] AND t15.[tp_Ordinal] = t4.[tp_Ordinal] AND t4.[tp_FieldId] = ''{e2f67328-beae-443a-91e6-34278ef58179}'' LEFT OUTER JOIN UserDataJunctionsVersioned AS t6 ON t14.[tp_SiteId] = t6.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t6.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t6.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t6.[tp_DirName] AND t14.[tp_LeafName] = t6.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t6.[tp_CalculatedVersion] AND t14.[tp_Level] = t6.[tp_Level] AND t15.[tp_Ordinal] = t6.[tp_Ordinal] AND t6.[tp_FieldId] = ''{0e241992-fcea-4385-9dde-1bfd15602f5b}'' LEFT OUTER JOIN UserDataJunctionsVersioned AS t7 ON t14.[tp_SiteId] = t7.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t7.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t7.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t7.[tp_DirName] AND t14.[tp_LeafName] = t7.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t7.[tp_CalculatedVersion] AND t14.[tp_Level] = t7.[tp_Level] AND t15.[tp_Ordinal] = t7.[tp_Ordinal] AND t7.[tp_FieldId] = ''{67e5ed65-a2e4-4522-918f-cce886fdda5c}'' LEFT OUTER JOIN UserDataJunctionsVersioned AS t8 ON t14.[tp_SiteId] = t8.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t8.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t8.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t8.[tp_DirName] AND t14.[tp_LeafName] = t8.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t8.[tp_CalculatedVersion] AND t14.[tp_Level] = t8.[tp_Level] AND t15.[tp_Ordinal] = t8.[tp_Ordinal] AND t8.[tp_FieldId] = ''{cec57d0f-6e5b-4e08-bafe-c8759ba0c8b2}'' LEFT OUTER JOIN UserDataJunctionsVersioned AS t9 ON t14.[tp_SiteId] = t9.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t9.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t9.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t9.[tp_DirName] AND t14.[tp_LeafName] = t9.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t9.[tp_CalculatedVersion] AND t14.[tp_Level] = t9.[tp_Level] AND t15.[tp_Ordinal] = t9.[tp_Ordinal] AND t9.[tp_FieldId] = ''{6cd2e861-f434-4b25-ad8f-b0930311759d}'' LEFT OUTER JOIN UserDataJunctionsVersioned AS t10 ON t14.[tp_SiteId] = t10.[tp_SiteId] AND t14.[tp_DeleteTransactionId] = t10.[tp_DeleteTransactionId] AND t14.[tp_IsCurrentVersion] = t10.[tp_IsCurrentVersion] AND t14.[tp_DirName] = t10.[tp_DirName] AND t14.[tp_LeafName] = t10.[tp_LeafName] AND t14.[tp_CalculatedVersion] = t10.[tp_CalculatedVersion] AND t14.[tp_Level] = t10.[tp_Level] AND t15.[tp_Ordinal] = t10.[tp_Ordinal] AND t10.[tp_FieldId] = ''{b743b55b-d144-4940-b25a-601ff3615587}'' LEFT OUTER JOIN (SELECT * FROM UserData AS t19_u WITH(NOLOCK) INNER JOIN Docs AS t19_d WITH(NOLOCK) ON (t19_d.DoclibRowId = t19_u.tp_ID AND t19_d.SiteId = t19_u.tp_SiteId AND t19_d.SiteId = @L2 AND t19_d.DirName = t19_u.tp_DirName AND t19_d.LeafName = t19_u.tp_LeafName AND t19_d.Level = t19_u.tp_Level AND (t19_u.tp_Level = 255 AND t19_d.LTCheckoutUserId =@IU OR (t19_u.tp_Level = 1 AND (t19_u.tp_DraftOwnerId IS NULL OR (t19_u.tp_DraftOwnerId <>@IU AND t19_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t19_u.tp_Level = 2 AND (t19_u.tp_DraftOwnerId = @IU OR t19_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t19_d.LTCheckoutUserId IS NULL OR t19_d.LTCheckoutUserId <> @IU )) AND (t19_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233'')))) AS t19 ON (t19.[tp_ListId] = @L7 AND t19.[tp_Id] = t2.[tp_ID] AND t19.[tp_RowOrdinal] = 0) LEFT OUTER JOIN (SELECT * FROM UserData AS t20_u WITH(NOLOCK) INNER JOIN Docs AS t20_d WITH(NOLOCK) ON (t20_d.DoclibRowId = t20_u.tp_ID AND t20_d.SiteId = t20_u.tp_SiteId AND t20_d.SiteId = @L2 AND t20_d.DirName = t20_u.tp_DirName AND t20_d.LeafName = t20_u.tp_LeafName AND t20_d.Level = t20_u.tp_Level AND (t20_u.tp_Level = 255 AND t20_d.LTCheckoutUserId =@IU OR (t20_u.tp_Level = 1 AND (t20_u.tp_DraftOwnerId IS NULL OR (t20_u.tp_DraftOwnerId <>@IU AND t20_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t20_u.tp_Level = 2 AND (t20_u.tp_DraftOwnerId = @IU OR t20_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t20_d.LTCheckoutUserId IS NULL OR t20_d.LTCheckoutUserId <> @IU )) AND (t20_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233'')))) AS t20 ON (t20.[tp_ListId] = @L7 AND t20.[tp_Id] = t3.[tp_ID] AND t20.[tp_RowOrdinal] = 0) LEFT OUTER JOIN (SELECT * FROM UserData AS t21_u WITH(NOLOCK) INNER JOIN Docs AS t21_d WITH(NOLOCK) ON (t21_d.DoclibRowId = t21_u.tp_ID AND t21_d.SiteId = t21_u.tp_SiteId AND t21_d.SiteId = @L2 AND t21_d.DirName = t21_u.tp_DirName AND t21_d.LeafName = t21_u.tp_LeafName AND t21_d.Level = t21_u.tp_Level AND (t21_u.tp_Level = 255 AND t21_d.LTCheckoutUserId =@IU OR (t21_u.tp_Level = 1 AND (t21_u.tp_DraftOwnerId IS NULL OR (t21_u.tp_DraftOwnerId <>@IU AND t21_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t21_u.tp_Level = 2 AND (t21_u.tp_DraftOwnerId = @IU OR t21_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t21_d.LTCheckoutUserId IS NULL OR t21_d.LTCheckoutUserId <> @IU )) AND (t21_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233'')))) AS t21 ON (t21.[tp_ListId] = @L8 AND t21.[tp_Id] = t4.[tp_ID] AND t21.[tp_RowOrdinal] = 0) LEFT OUTER JOIN (SELECT * FROM UserData AS t22_u WITH(NOLOCK) INNER JOIN Docs AS t22_d WITH(NOLOCK) ON (t22_d.DoclibRowId = t22_u.tp_ID AND t22_d.SiteId = t22_u.tp_SiteId AND t22_d.SiteId = @L2 AND t22_d.DirName = t22_u.tp_DirName AND t22_d.LeafName = t22_u.tp_LeafName AND t22_d.Level = t22_u.tp_Level AND (t22_u.tp_Level = 255 AND t22_d.LTCheckoutUserId =@IU OR (t22_u.tp_Level = 1 AND (t22_u.tp_DraftOwnerId IS NULL OR (t22_u.tp_DraftOwnerId <>@IU AND t22_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t22_u.tp_Level = 2 AND (t22_u.tp_DraftOwnerId = @IU OR t22_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t22_d.LTCheckoutUserId IS NULL OR t22_d.LTCheckoutUserId <> @IU )) AND (t22_d.ScopeId=@L3))) AS t22 ON (t22.[tp_ListId] = @L4 AND t22.[tp_Id] = t6.[tp_ID] AND t22.[tp_RowOrdinal] = 0) LEFT OUTER JOIN (SELECT * FROM UserData AS t23_u WITH(NOLOCK) INNER JOIN Docs AS t23_d WITH(NOLOCK) ON (t23_d.DoclibRowId = t23_u.tp_ID AND t23_d.SiteId = t23_u.tp_SiteId AND t23_d.SiteId = @L2 AND t23_d.DirName = t23_u.tp_DirName AND t23_d.LeafName = t23_u.tp_LeafName AND t23_d.Level = t23_u.tp_Level AND (t23_u.tp_Level = 255 AND t23_d.LTCheckoutUserId =@IU OR (t23_u.tp_Level = 1 AND (t23_u.tp_DraftOwnerId IS NULL OR (t23_u.tp_DraftOwnerId <>@IU AND t23_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t23_u.tp_Level = 2 AND (t23_u.tp_DraftOwnerId = @IU OR t23_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t23_d.LTCheckoutUserId IS NULL OR t23_d.LTCheckoutUserId <> @IU )) AND (t23_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233'')))) AS t23 ON (t23.[tp_ListId] = @L8 AND t23.[tp_Id] = t7.[tp_ID] AND t23.[tp_RowOrdinal] = 0) LEFT OUTER JOIN (SELECT * FROM UserData AS t24_u WITH(NOLOCK) INNER JOIN Docs AS t24_d WITH(NOLOCK) ON (t24_d.DoclibRowId = t24_u.tp_ID AND t24_d.SiteId = t24_u.tp_SiteId AND t24_d.SiteId = @L2 AND t24_d.DirName = t24_u.tp_DirName AND t24_d.LeafName = t24_u.tp_LeafName AND t24_d.Level = t24_u.tp_Level AND (t24_u.tp_Level = 255 AND t24_d.LTCheckoutUserId =@IU OR (t24_u.tp_Level = 1 AND (t24_u.tp_DraftOwnerId IS NULL OR (t24_u.tp_DraftOwnerId <>@IU AND t24_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t24_u.tp_Level = 2 AND (t24_u.tp_DraftOwnerId = @IU OR t24_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t24_d.LTCheckoutUserId IS NULL OR t24_d.LTCheckoutUserId <> @IU )) AND (t24_d.ScopeId=@L3))) AS t24 ON (t24.[tp_ListId] = @L4 AND t24.[tp_Id] = t8.[tp_ID] AND t24.[tp_RowOrdinal] = 0) LEFT OUTER JOIN (SELECT * FROM UserData AS t25_u WITH(NOLOCK) INNER JOIN Docs AS t25_d WITH(NOLOCK) ON (t25_d.DoclibRowId = t25_u.tp_ID AND t25_d.SiteId = t25_u.tp_SiteId AND t25_d.SiteId = @L2 AND t25_d.DirName = t25_u.tp_DirName AND t25_d.LeafName = t25_u.tp_LeafName AND t25_d.Level = t25_u.tp_Level AND (t25_u.tp_Level = 255 AND t25_d.LTCheckoutUserId =@IU OR (t25_u.tp_Level = 1 AND (t25_u.tp_DraftOwnerId IS NULL OR (t25_u.tp_DraftOwnerId <>@IU AND t25_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t25_u.tp_Level = 2 AND (t25_u.tp_DraftOwnerId = @IU OR t25_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t25_d.LTCheckoutUserId IS NULL OR t25_d.LTCheckoutUserId <> @IU )) AND (t25_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233'')))) AS t25 ON (t25.[tp_ListId] = @L7 AND t25.[tp_Id] = t9.[tp_ID] AND t25.[tp_RowOrdinal] = 0) LEFT OUTER JOIN (SELECT * FROM UserData AS t26_u WITH(NOLOCK) INNER JOIN Docs AS t26_d WITH(NOLOCK) ON (t26_d.DoclibRowId = t26_u.tp_ID AND t26_d.SiteId = t26_u.tp_SiteId AND t26_d.SiteId = @L2 AND t26_d.DirName = t26_u.tp_DirName AND t26_d.LeafName = t26_u.tp_LeafName AND t26_d.Level = t26_u.tp_Level AND (t26_u.tp_Level = 255 AND t26_d.LTCheckoutUserId =@IU OR (t26_u.tp_Level = 1 AND (t26_u.tp_DraftOwnerId IS NULL OR (t26_u.tp_DraftOwnerId <>@IU AND t26_d.ScopeId NOT IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) OR t26_u.tp_Level = 2 AND (t26_u.tp_DraftOwnerId = @IU OR t26_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233''))) AND (t26_d.LTCheckoutUserId IS NULL OR t26_d.LTCheckoutUserId <> @IU )) AND (t26_d.ScopeId IN (''028D254C-1C71-481D-A62D-5F1C2B1F3233'')))) AS t26 ON (t26.[tp_ListId] = @L7 AND t26.[tp_Id] = t10.[tp_ID] AND t26.[tp_RowOrdinal] = 0) ) AS t16 LEFT OUTER JOIN Docs AS t18 WITH(NOLOCK) ON t18.[SiteId] = t16.[tp_SiteId] AND t18.[DeleteTransactionId] = t16.[tp_DeleteTransactionId] AND t18.[DirName] = t16.[tp_DirName] AND t18.[LeafName] = t16.[tp_LeafName] AND t18.[Level] = t16.[tp_Level] LEFT OUTER JOIN UserDataVersioned AS t17 WITH(NOLOCK) ON t16.[tp_SiteId] = t17.[tp_SiteId] AND t16.[tp_DeleteTransactionId] = t17.[tp_DeleteTransactionId] AND t16.[tp_IsCurrentVersion] = t17.[tp_IsCurrentVersion] AND t16.[tp_DirName] = t17.[tp_DirName] AND t16.[tp_LeafName] = t17.[tp_LeafName] AND t16.[tp_CalculatedVersion] = t17.[tp_CalculatedVersion] AND t16.[tp_Level] = t17.[tp_Level] AND t17.[tp_RowOrdinal] = 0 ORDER BY t16.tp_UIVersion Desc,t16.tp_ID Asc,t16.[tp_Ordinal]'
,
N'@L0 uniqueidentifier,@L2 uniqueidentifier,@IU int,@L3 uniqueidentifier,@L4 uniqueidentifier,@L5 uniqueidentifier,@I6P int,@DN nvarchar(260),@DNEL nvarchar(1024),@L7 uniqueidentifier,@L8 uniqueidentifier'
,
@L0='00000000-0000-0000-0000-000000000000',
@L2='BC921A53-1407-4D3F-A3F4-FFCA8E38191D',
@IU=1073741823,
@L3='028D254C-1C71-481D-A62D-5F1C2B1F3233',
@L4='6B95520B-F7FD-4378-A28D-35153C24329D',
@L5='3F05AD46-3239-4F59-B9FC-577C4916869D',
@I6P=6371,
@DN=N'Lists/Product Information',
@DNEL=N'Lists/Product Information',
@L7='C2C4D95F-5156-48D5-82BE-D171F015D499',
@L8='A5C3BB1F-7849-4AAB-B1F0-489F6BBC984B'
答案 0 :(得分：1)
由于性能突然变坏，我能提供的最好的是你可能想要更新统计数据。我们没有太多办法来修复像Sharepoint这样糟糕的数据模型。