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Index fragmentation in sql server!
Optimize index maintenance to improve query performance and reduce resource consumption
Applies to:SQL ServerAzure SQL DatabaseAzure SQL Managed InstanceAnalytics Platform System (PDW)SQL database in Microsoft Fabric
This article helps you decide when and how to perform index maintenance.
It covers concepts such as index fragmentation and page density, and their impact on query performance and resource consumption. It describes index maintenance methods, reorganizing an index and rebuilding an index, and suggests an index maintenance strategy that balances potential performance improvements against resource consumption required for maintenance.
Concepts: index fragmentation and page density
What is index fragmentation and how it impacts performance:
In B-tree (rowstore) indexes, fragmentation exists when indexes have pages in which the logical ordering within the index, based on the key values of the index, does not match the physical ordering of index pages.
Note
Documentation uses the term B-tree generally in reference to indexes.
In rowstore indexes, the Database
- difference between rebuild and reorganize index in sql server
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