MICROSOFT SQL SERVER
Manually updating statistics to improve query performance
Jyoti Bhatia
03.13.2002
Rating: --- (out of 5)
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Do you have a large number of rows being added to or deleted from a table (during the day or
as a part of a night job)? Do your users report that their initial queries are very slow but
then response time improves for subsequent queries?
If so, you can handle this situation by improving the response time for the initial queries
by not only relying on the assumption that the auto update statistics database option is set to
TRUE. You should also manually update the statistics (on indexes) by using the sp_updatestats
stored procedure.
Do not rely on the auto update stats option as this may not take effect immediately, thereby
degrading performance.
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