July 2012
Intermediate to advanced
478 pages
10h 3m
English
Content preview from Microsoft SQL Server 2012 Performance Tuning CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Enhance index efficiency by using the REORGANIZE index
If the fragmentation level is less than 30 percent, one must use REORGANIZE on the index, instead of REBUILD. The REORGANIZE index doesn't produce locks on data pages or tables, leaving the object available for users to use, and takes less server resources and CPU utilization, as compared with REBUILD index.
In short, REORGANIZE is the process of cleaning up current B-Tree (especially leaf level of index), organizing data pages, and defragmenting it. Unlike REBUILD, REORGANIZE won't add any new pages; if this is needed, it just cleans up current pages and defragments them.
Getting ready
To decide whether to use a REORGANIZE index or not, have a look at the fragmentation level of the index first; ...
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