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HomeHomeUsing DNN Platf...Using DNN Platf...Performance and...Performance and...Improving search index performanceImproving search index performance
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9/9/2011 4:56 AM
 
Matthias Wemel


Joined: 1/7/2011
Posts: 12
Recently we were encountering long search index times. Sometimes it took more than 2 hours to complete the index.
Taking a look at our SQL server revealed a DELETE query that took about 5 sec average time to execute. (and it executes a lot!)
Creating the following index lowered this time to 20-30 milliseconds

CREATE NONCLUSTERED INDEX [SearchItemWordPositionWithInclude] ON [dbo].[SearchItemWordPosition]
(
      [SearchItemWordID] ASC
)
INCLUDE ( [SearchItemWordPositionID]) 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

 After I added this index our search index took only 150 seconds to complete!

Please test this on your DNN instance and report back !

Maybe this index can be added to the DNN base if?

best regards and good luck
 
New Post
9/9/2011 8:36 AM
 
cathal connolly


cathal connolly's Avatar

www.cathal.co.uk
Joined: 4/9/2003
Posts: 9676
please log this at support.dotnetnuke.com so we can evaluate it for a future build
Buy the new Professional DNN7: Open Source .NET CMS Platform book Amazon US
 
New Post
9/9/2011 8:44 AM
 
Matthias Wemel


Joined: 1/7/2011
Posts: 12
 
New Post
9/19/2011 3:19 PM
 
Scott Schlesier


Joined: 6/14/2010
Posts: 119
As part of supporting azure, a clustered index was added to this column for new installs of 6.0.0. Upgrades do not yet have this index, but will soon (hopefully 6.1.0).
 
New Post
10/18/2011 4:08 AM
 
Matthias Wemel


Joined: 1/7/2011
Posts: 12
Hi, could you point me in the right direction where to find the create script of this index?I cannot seem to find it in the SqlDataProvider folder of a 6.0.2 fresh install.Thanks!
 
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