NC Index Seek 51% and select cost 0%?

• SQL Galaxy

  One Orange Chip

  Points: 29472

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  July 15, 2013 at 5:47 am

  #1632421

  Hi Chris,

  Index created,

  CREATE NONCLUSTERED INDEX [IX_VIEW_IP21] ON [dbo].[RESULT]

  (

  [SAMPLE_NUMBER] ASC,

  [STATUS] ASC,

  [ANALYSIS] ASC

  )

  INCLUDE ( [UNITS],

  [NAME],

  [NUMERIC_ENTRY]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

  GO

  But actucal exec.plan high seek 94% which created new index on that table...

  could we remove that new index?

  thanks

• ChrisM@Work

  SSC Guru

  Points: 186127

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  July 15, 2013 at 6:08 am

  #1632429

  Change the order of the keys - this should give you seeks on [status];

  CREATE NONCLUSTERED INDEX [IX_VIEW_IP21] ON [dbo].[RESULT]

  (

  [STATUS] ASC,

  [SAMPLE_NUMBER] ASC,

  [ANALYSIS] ASC

  )

  INCLUDE ( [UNITS],

  [NAME],

  [NUMERIC_ENTRY]) WITH (PAD_INDEX = OFF,

  STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF,

  IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF,

  ONLINE = OFF, ALLOW_ROW_LOCKS = ON,

  ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

  GO

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• Gail Shaw

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  Points: 1004504

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  July 15, 2013 at 6:37 am

  #1632439

  ananda.murugesan (7/15/2013)

  ---

  But actucal exec.plan high seek 94% which created new index on that table...

  Why are you fixated on the cost % of the index seek in the plan?

  Gail Shaw
  Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
  SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

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