Automate INDEX rebuild based on fragmentation results?

Question

Is it possible to add a maintenance job to check indexes fragmentation. If greater than 50% then rebuild those indexes automatically ?

Index size can vary from 100MB to

Answer 1

yes, you can.

You can get the fragmented indexes using this query:

SELECT OBJECT_NAME(i.OBJECT_ID) AS TableName,
i.name AS IndexName,
indexstats.avg_fragmentation_in_percent
FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, 'DETAILED') indexstats
INNER JOIN sys.indexes i ON i.OBJECT_ID = indexstats.OBJECT_ID
AND i.index_id = indexstats.index_id
WHERE indexstats.avg_fragmentation_in_percent > 20

and based on the result just build a command to recreate them

I would wrap everything on a Stored Procedure and call it from a SQL Server Job

FYI, 50% is a very big fragmentation. I would go with less.