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How to Catch SQL Server®
Performance Hogs
Pinal Dave
November 30, 2017
What is a Performance Hog?
Performance Hog is the guy who is never satisfied. He always wants more,
regardless of how much he has consumed already.
© 2017 SolarWinds Worldwide, LLC. All rights reserved.
Performance Hog
Where is the Performance Hog?
© 2017 SolarWinds Worldwide, LLC. All rights reserved.
Performance Hog
© 2017 SolarWinds Worldwide, LLC. All rights reserved.
Performance Hog
• Database Settings
• Cardinality
• Statistics
• Before and After Reports
• Wait Stats
• Frequently Ran Queries
• Important Resources
© 2017 SolarWinds Worldwide, LLC. All rights reserved.
Agenda
• Auto create statistics
• Auto update statistics
• Helps query optimizer to generate the optimal plan
• Latest statistics  better execution plan
© 2017 SolarWinds Worldwide, LLC. All rights reserved.
Database Settings - Statistics
• Predicts rows your query likely to return
• Helps query optimizer to generate the optimal plan
• Latest CE is more accurate
• Latest CE  more optimal query plan
© 2017 SolarWinds Worldwide, LLC. All rights reserved.
Cardinality Estimation
• Displays server-level bottlenecks
• Focus on IO, CPU, and memory
© 2017 SolarWinds Worldwide, LLC. All rights reserved.
Server Bottlenecks With Wait Stats
• SQL Tuning Scripts:
https://go.sqlauthority.com
© 2017 SolarWinds Worldwide, LLC. All rights reserved.
Questions
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exclusive property of SolarWinds Worldwide, LLC or its affiliates, are registered
with the U.S. Patent and Trademark Office, and may be registered or pending
registration in other countries. All other SolarWinds trademarks, service marks,
and logos may be common law marks or are registered or pending
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How to Catch SQL Server Performance Hogs - Webcast

  • 1. How to Catch SQL Server® Performance Hogs Pinal Dave November 30, 2017
  • 2. What is a Performance Hog? Performance Hog is the guy who is never satisfied. He always wants more, regardless of how much he has consumed already. © 2017 SolarWinds Worldwide, LLC. All rights reserved. Performance Hog
  • 3. Where is the Performance Hog? © 2017 SolarWinds Worldwide, LLC. All rights reserved. Performance Hog
  • 4. © 2017 SolarWinds Worldwide, LLC. All rights reserved. Performance Hog
  • 5. • Database Settings • Cardinality • Statistics • Before and After Reports • Wait Stats • Frequently Ran Queries • Important Resources © 2017 SolarWinds Worldwide, LLC. All rights reserved. Agenda
  • 6. • Auto create statistics • Auto update statistics • Helps query optimizer to generate the optimal plan • Latest statistics  better execution plan © 2017 SolarWinds Worldwide, LLC. All rights reserved. Database Settings - Statistics
  • 7. • Predicts rows your query likely to return • Helps query optimizer to generate the optimal plan • Latest CE is more accurate • Latest CE  more optimal query plan © 2017 SolarWinds Worldwide, LLC. All rights reserved. Cardinality Estimation
  • 8. • Displays server-level bottlenecks • Focus on IO, CPU, and memory © 2017 SolarWinds Worldwide, LLC. All rights reserved. Server Bottlenecks With Wait Stats
  • 9. • SQL Tuning Scripts: https://go.sqlauthority.com © 2017 SolarWinds Worldwide, LLC. All rights reserved. Questions
  • 10. The SolarWinds, SolarWinds & Design, Orion, and THWACK trademarks are the exclusive property of SolarWinds Worldwide, LLC or its affiliates, are registered with the U.S. Patent and Trademark Office, and may be registered or pending registration in other countries. All other SolarWinds trademarks, service marks, and logos may be common law marks or are registered or pending registration. All other trademarks mentioned herein are used for identification purposes only and are trademarks of (and may be registered trademarks) of their respective companies.