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  SQL Server Tips by Burleson

Index/Database Tuning Wizard

The Index Tuning Wizard has its critics, yet it has its champions as well. The concept is excellent: give SQL Server an SQL-based workload or set of individual queries to work with, and let the SQL Server reveal what object-based solutions may be of benefit in improving performance.

Critics say the Index Tuning Wizard fails on many occasions to recommend a proper indexing scheme or suggests indexes that are ineffective. However, as has already been mentioned, tuning SQL and a database’s physical design is an art form. Thus, it is never a bad idea to get advice from as many sources as possible. Besides, just like anything else, the Index Tuning Wizard has gotten better over time, so it is worth a try.

In SQL Server 2005, the utility has been renamed the Database Tuning Advisor and has been updated to include partitioning recommendations.

The DBA can feed either utility a trace file created through server-side tracing or SQL Profiler or a list of queries for SQL Server to examine. Thus, the tool performs a thorough examination of the database and SQL structures and presents recommendations.

Again, the Index/Database Tuning Wizard/Advisor is not perfect, but can prove helpful in the right situations.

The above book excerpt is from:

High-Performance SQL Server DBA
Tuning & Optimization Secrets

ISBN: 0-9761573-6-5
Robin Schumacher  

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