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Rebuilding an index can result in fragmented index when ALLOW_PAGE_LOCKS option is not enabled

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Symptoms

When you perform an Index rebuild operation on a multicore machine, it might result in a fragmented index if ALLOW_PAGE_LOCKS option is disabled during the rebuild operation.

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Cause

This behavior is by design.

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Resolution

Enable page locks optionat index level using the following t-sql statement: 
ALTER INDEX [index_name] ON [table_name] SET ( ALLOW_PAGE_LOCKS  = ON )




Another option would be to execute the rebuild index command using MAXDOP = 1 query hint so that the index is not rebuilt using parallelism.

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Article Info
Article ID : 2292737
Revision : 1
Created on : 1/7/2017
Published on : 12/17/2010
Exists online : False
Views : 664