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denis_the_thief
Aged Yak Warrior
596 Posts |
 Posted - 2011-08-17 : 14:49:09
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| I'm hoping anyone can point me in the right direction regarding Table Spools. They seem to be notorious for slow.I look at the Execution Path:- Stores the data from the input into a temporary table in order to optimize rewinds.- Estimated Number of Rows - 1,062.56- Actual Number of Rows - 20,036,927The Ouput List columns belong to a Table with 77,000 rows. How/why can SQL Server make a table of 20 million rows when the source table is only 77,000? What is a Rewind? Any ideas who to get rid of the Table Spool? |
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tkizer
Almighty SQL Goddess
38200 Posts |
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denis_the_thief
Aged Yak Warrior
596 Posts |
Posted - 2011-08-17 : 15:14:16
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quote:
Originally posted by tkizer
Sounds like you've got out-of-date stats. Have you run UPDATE STATS on the table, preferably with FULLSCAN?Tara Kizer
Thanks - yes they have been run. |
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tkizer
Almighty SQL Goddess
38200 Posts |
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denis_the_thief
Aged Yak Warrior
596 Posts |
Posted - 2011-08-17 : 16:17:19
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| Yes, it did recommend one. It was a covering one where the index itself already existed - I will try it... |
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Nasty Table Spool