HiI run a query on indxes . and this is 3 records of result :TBL_1 --------- IX_1 user_seeks = 78 ------- User_Scans = 477 ------ User_Lookup = 0 --------- User_Updates = 7707 -- Cost = (seek/update ) = 98TBL_2 --------- IX_2 user_seeks = 6 ------- User_Scans = 2827 ------ User_Lookup = 0 --------- User_Updates = 314 -- Cost = (seek/update ) = 52TBL_3 --------- IX_3 user_seeks = 296 --- User_Scans = 70329 ------ User_Lookup = 204635 -- User_Updates = 13166 -- Cost = (seek/update ) = 44TBL_4 --------- IX_4 user_seeks = 2443 --- User_Scans = 0 --- ------ User_Lookup = 0 --------- User_Updates =35000 -- Cost = (seek/update ) =14part a : (nonclustered)Ix_1 : Yes it should be deleted . Ix_2 : has 2877 scan ? deleted ?Ix_3 : huge lookup and update ? deleted?part b : (clustered)we have a record such as IX_3 on clustered index ? what do I do ?and some times I have a clustered index with 0 seek and n.... update . deleted ? or change ?
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