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06.05.2008 at 04:26AM PDT, ID: 23459748
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8.9

USING dm_db_index_physical_stats effectively

Asked by sqlconsumer in SQL Server 2005

Tags:

Hi,

I've spent the last few days playing arround with dm_db_index_physical_stats to try and dynamically REBUILD/REORGANIZE indexes.

Using dm_db_index_physical_stats I get a list of indexes that have a avg_page_space_used_in_percent value > 60.

So as the acticles say I should run a rebuild on these indicies. So I simply run...

ALTER INDEX ALL ON Practice.ISOL1471 REBUILD WITH (FILLFACTOR=90, ONLINE=ON);

Which complete with success.

I run dm_db_index_physical_stats for a second time. This is where I'm confused as I get the same level of defrag. Which would suggest that no defragmentation has taken place.

This is driving me up the wall. Any suggestions ???

Thanks in advanceStart Free Trial 
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SELECT  OBJECT_NAME(s.object_id) AS Table_Name, avg_page_space_used_in_percent, avg_fragmentation_in_percent  
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, 'DETAILED') s
WHERE OBJECT_NAME(s.object_id) = 'ISOL1471' AND
	(
	(avg_page_space_used_in_percent > 60) OR 
	(avg_fragmentation_in_percent < 15)
	)
 
ALTER INDEX ALL ON Practice.ISOL1471 REBUILD WITH (FILLFACTOR=90, ONLINE=ON);
 
SELECT  OBJECT_NAME(s.object_id) AS Table_Name, avg_page_space_used_in_percent, avg_fragmentation_in_percent  
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, 'DETAILED') s
WHERE OBJECT_NAME(s.object_id) = 'ISOL1471' AND
	(
	(avg_page_space_used_in_percent > 60) OR 
	(avg_fragmentation_in_percent < 15)
	)
 
Keywords: USING dm_db_index_physical_stats…
Title
1 SQL defrag
2 sbs 2003 and defrag
3 Event Log Entries in Defrag VB Script
4 best defrager?
5 Which Defrag for Servers?
6 Defragment all machines in a file
 
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[+][-]06.05.2008 at 05:08AM PDT, ID: 21718354

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About this solution

Zone: SQL Server 2005
Tags: MS SQL server
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Solution Provided By: chapmandew
Participating Experts: 1
Solution Grade: B
 
 
 
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