O'Reilly logo

Microsoft® SQL Server 2012 Unleashed by Alex T. Silverstein, Chris Gallelli, Paul T. Bertucci, Ray Rankins

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Monitoring Auto-Update Statistics

As discussed in Chapter 31, “Understanding Query Optimization,” SQL Server updates index statistics automatically as data is changed in a table. In some environments, excessive auto-updating of statistics can affect system performance while the statistics are being updated. SQL Profiler can be used to monitor auto-updating of statistics as well as automatic statistics creation.

To monitor auto-updating of statistics, you create a trace and include the AutoStats event from the Performance event category. Then you select the TextData, Integer Data, Success, and Object ID columns. When the AutoStats event is captured, the Integer Data column contains the number of statistics updated for a given table, the Object ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required