Rebuilding Indexes

Last Post 11 Jun 2009 01:21 PM by robpatt. 0 Replies.
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11 Jun 2009 01:21 PM
I have written a script that uses the dynamic management view sys.dm_db_index_physical_stats to identify the indexes for a particular database that need to be rebuilt, then rebuilds them and generates a report of the before and after fragmentation percentages.

Here is my question, why do the indexes with a lower page_count sometimes end up with a higher avg_fragmentation_in_percent after a alter index xxxx on dbo.xxxx rebuild is run?

I also tried alter index xxxx on reorganize, same results, lower page count indexes didn't change their fragmentation percentage and sometimes the percentage of fragmentation went up????

How weird is that?

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