SSAS 多维数据集处理中的查询超时已过期

Question

在将多维数据集从 2008 年迁移到 2014 年时，我们遇到了多维数据集处理失败，并显示消息“查询超时已过期：HYT00”。我查看了错误信息，发现某个查询执行了一个多小时，这导致了问题。查询是，

SELECT [dbo_IndicatorFact].[PY] AS [dbo_IndicatorFactPY0_0],[dbo_IndicatorFact].[BP] AS [dbo_IndicatorFactBP0_1],[dbo_IndicatorFact].[RE] AS [dbo_IndicatorFactRE0_2],[dbo_IndicatorFact].[UCPY] AS [dbo_IndicatorFactUCPY0_3],[dbo_IndicatorFact].[UCBP] AS [dbo_IndicatorFactUCBP0_4],[dbo_IndicatorFact].[UCRE] AS [dbo_IndicatorFactUCRE0_5],[dbo_IndicatorFact].[GRPY] AS [dbo_IndicatorFactGRPY0_6],[dbo_IndicatorFact].[GRBP] AS [dbo_IndicatorFactGRBP0_7],[dbo_IndicatorFact].[GRRE] AS [dbo_IndicatorFactGRRE0_8],[dbo_IndicatorFact].[NRPY] AS [dbo_IndicatorFactNRPY0_9],[dbo_IndicatorFact].[NRBP] AS [dbo_IndicatorFactNRBP0_10],[dbo_IndicatorFact].[NRRE] AS [dbo_IndicatorFactNRRE0_11],[dbo_IndicatorFact].[GRC2] AS [dbo_IndicatorFactGRC20_12],[dbo_IndicatorFact].[AnalysisCategoryId] AS [dbo_IndicatorFactAnalysisCategoryId0_13],[dbo_IndicatorFact].[IndicatorTypeId] AS [dbo_IndicatorFactIndicatorTypeId0_14],[dbo_IndicatorFact].[IndicatorNameId] AS [dbo_IndicatorFactIndicatorNameId0_15],[dbo_IndicatorFact].[CategoryId] AS [dbo_IndicatorFactCategoryId0_16],[dbo_IndicatorFact].[CountryId] AS [dbo_IndicatorFactCountryId0_17],[dbo_IndicatorFact].[FiscalQuarterId] AS [dbo_IndicatorFactFiscalQuarterId0_18]
 FROM 
  (

  SELECT vwIndicatorFact.IndicatorId AS Id, 
  CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN vwIndicatorFact.PY ELSE CASE IndicatorFact_GRC2.PY WHEN 0 THEN 0 ELSE vwIndicatorFact.PY END END AS PY, 
  CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN vwIndicatorFact.BP ELSE CASE IndicatorFact_GRC2.BP WHEN 0 THEN 0 ELSE vwIndicatorFact.BP END END AS BP, 
  CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN vwIndicatorFact.RE ELSE CASE IndicatorFact_GRC2.RE WHEN 0 THEN 0 ELSE vwIndicatorFact.RE END END AS RE, 
  vwIndicatorFact.BPvsPY, vwIndicatorFact.BPvsPYpercent, vwIndicatorFact.REvsBP, vwIndicatorFact.REvsBPpercent, vwIndicatorFact.REvsPY,
  vwIndicatorFact.REvsPYpercent, 
  CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.PY END ELSE CASE IndicatorFact_GRC2.PY
   WHEN 0 THEN 0 ELSE CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.PY END END END AS UCPY, 
  CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.BP END ELSE CASE IndicatorFact_GRC2.BP
   WHEN 0 THEN 0 ELSE CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.BP END END END AS UCBP, 
  CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.RE END ELSE CASE IndicatorFact_GRC2.RE
   WHEN 0 THEN 0 ELSE CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.RE END END END AS UCRE, vwIndicatorFact.IndicatorNameId, 
  vwIndicatorFact.CategoryId, vwIndicatorFact.AnalysisCategoryId, vwIndicatorFact.CountryId, vwIndicatorFact.FiscalQuarterId, vwIndicatorFact.IndicatorTypeId, 
  CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_GR.PY ELSE CASE IndicatorFact_GRC2.PY WHEN 0 THEN 0 ELSE IndicatorFact_GR.PY END END AS GRPY,
   CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_GR.BP ELSE CASE IndicatorFact_GRC2.BP WHEN 0 THEN 0 ELSE IndicatorFact_GR.BP END END AS GRBP,
   CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_GR.RE ELSE CASE IndicatorFact_GRC2.RE WHEN 0 THEN 0 ELSE IndicatorFact_GR.RE END END AS GRRE,
   CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_NR.PY ELSE CASE IndicatorFact_GRC2.PY WHEN 0 THEN 0 ELSE IndicatorFact_NR.PY END END AS NRPY,
   CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_NR.BP ELSE CASE IndicatorFact_GRC2.BP WHEN 0 THEN 0 ELSE IndicatorFact_NR.BP END END AS NRBP,
   CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_NR.RE ELSE CASE IndicatorFact_GRC2.RE WHEN 0 THEN 0 ELSE IndicatorFact_NR.RE END END AS NRRE,
   IndicatorFact_GRC2.BP AS GRC2
FROM     
  dbo.vwIndicatorFact INNER JOIN
  dbo.vwIndicatorFact AS IndicatorFact_UC ON vwIndicatorFact.IndicatorTypeId = IndicatorFact_UC.IndicatorTypeId AND 
  vwIndicatorFact.FiscalQuarterId = IndicatorFact_UC.FiscalQuarterId AND vwIndicatorFact.CountryId = IndicatorFact_UC.CountryId AND 
  vwIndicatorFact.CategoryId = IndicatorFact_UC.CategoryId AND IndicatorFact_UC.IndicatorNameId = 1 LEFT OUTER JOIN
  dbo.vwIndicatorFact AS IndicatorFact_GR ON vwIndicatorFact.IndicatorTypeId = IndicatorFact_GR.IndicatorTypeId AND 
  vwIndicatorFact.FiscalQuarterId = IndicatorFact_GR.FiscalQuarterId AND vwIndicatorFact.CountryId = IndicatorFact_GR.CountryId AND 
  vwIndicatorFact.CategoryId = IndicatorFact_GR.CategoryId AND IndicatorFact_GR.IndicatorNameId = 3 AND 
  IndicatorFact_GR.AnalysisCategoryId = vwIndicatorFact.AnalysisCategoryId LEFT OUTER JOIN
  dbo.vwIndicatorFact AS IndicatorFact_NR ON vwIndicatorFact.IndicatorTypeId = IndicatorFact_NR.IndicatorTypeId AND 
  vwIndicatorFact.FiscalQuarterId = IndicatorFact_NR.FiscalQuarterId AND vwIndicatorFact.CountryId = IndicatorFact_NR.CountryId AND 
  vwIndicatorFact.CategoryId = IndicatorFact_NR.CategoryId AND IndicatorFact_NR.IndicatorNameId = 5 AND 
  IndicatorFact_NR.AnalysisCategoryId = vwIndicatorFact.AnalysisCategoryId LEFT OUTER JOIN
  dbo.vwIndicatorFact AS IndicatorFact_GRC2 ON IndicatorFact_GRC2.IndicatorTypeId = 2 AND vwIndicatorFact.FiscalQuarterId = IndicatorFact_GRC2.FiscalQuarterId AND 
  vwIndicatorFact.CountryId = IndicatorFact_GRC2.CountryId AND vwIndicatorFact.CategoryId = IndicatorFact_GRC2.CategoryId AND 
  IndicatorFact_GRC2.IndicatorNameId = 3 AND IndicatorFact_GRC2.AnalysisCategoryId = 2
   )
   AS [dbo_IndicatorFact]

这基本上是在包含 30 万条记录的特定视图上的多个自连接。我们的 dba 更新了所有索引并更新了统计信息，但我们仍然无法快速执行此查询。如果此查询执行得更快，则多维数据集可能会处理得更快。视图中的数据也没有不一致。需要一些关于这里可能出现的问题的建议。

这方面的一些背景信息 - 这是我们正在进行的迁移项目的一部分。旧的开发环境能够在大约 20 秒内执行相同的查询，并且视图中的记录数相似。新开发者需要永远用相同的视图执行相同的查询。

Answer 1

在你的陈述中它可以是任何东西：糟糕的索引、过时的统计数据、糟糕的陈述、庞大的数据......

我有类似的问题，我在 SSAS 中增加了外部命令超时（默认为 1 小时）。如果您无法优化查询，请看这里如何做：

http://www.msbiguide.com/2013/01/how-to-increase-externalcommandtimeout-in-ssas/