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SQL Server 2008
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SQL Server 2008 Administration
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fix fragmentation sql server
15 posts, Page 1 of 2
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fix fragmentation sql server
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ronald_yoh
ronald_yoh
Posted Wednesday, September 08, 2010 9:02 PM
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Hi,
I just shrunk the database using DBCC SHRINK statement. what would be the best approach to fix the fragmentation after shrinking the database?
Post #982768
GilaMonster
GilaMonster
Posted Wednesday, September 08, 2010 11:17 PM
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Rebuild all indexes.
Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass
Post #982808
Halcyon
Halcyon
Posted Friday, September 10, 2010 2:49 AM
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Rebuild all indexes via alter <<index name>> on <<table name>> rebuild
then run exec sp_updatestats
Post #983609
SQLCharger
SQLCharger
Posted Wednesday, September 22, 2010 8:12 AM
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My understanding is that rebuilding all indexes will also update their statistics with full scan - so sp_updatestats will just replace the statistics with sampled ones.
Cheers,
JohnA
Post #991202
shaun.stuart
shaun.stuart
Posted Thursday, September 23, 2010 11:23 AM
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John__A is correct. Don't run the update stats sp after rebuilding all the indexes because you will be replacing stats that are based on a full scan with ones that are based on a sampled scan, possibly resulting in less accurate statistics.
Post #992220
ronald_yoh
ronald_yoh
Posted Friday, September 24, 2010 2:47 AM
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do i need to rebuild all indexes one by one for each tables? as there might be a hundreds of indexes all up
Post #992558
Halcyon
Halcyon
Posted Friday, September 24, 2010 3:13 AM
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I recommend to use MS script using sys.dm_db_index_physical_stats at http://msdn.microsoft.com/en-us/library/ms188917.aspx
Version 2008 R2, but versions up to 2005 are available.
Post #992567
shaun.stuart
shaun.stuart
Posted Friday, September 24, 2010 7:52 AM
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Or just make a maintenance plan that rebuilds them all in all databases. Schedule it for off hours though.
Post #992793
JPJ
JPJ
Posted Monday, August 29, 2011 3:01 AM
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Will "Rebuild all indexes" will also work with Indexes on composite primary keys?
Post #1166816
shaun.stuart
shaun.stuart
Posted Monday, August 29, 2011 4:27 PM
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Yes.
Post #1167238
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