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1© 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 1
Pinal Dave
MySQL Performance Troubleshooting with
Limited Time and Resources
© 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 22
Agenda
▪ Basics of Optimizer
▪ Indexing
▪ Query Re-writing
▪ Best Practices
▪ Summary
© 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 33
Understanding EXPLAIN Command
▪ Cost based optimizer
▪ Converts sub-optimal join types to efficient logic
▪ Reorder join tables
▪ Reducing constant expressions
▪ Optimizing algebraic rules
▪ Logic short circuit
▪ Optimal index usage
© 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 44
Query Optimizer
EXPLAIN SELECT Query
© 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 55
Demo: Practical
Performance Tuning
Free Scripts:
https://go.sqlauthority.com
© 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 66
THANKS!
Any questions?
You can find me at:
@pinaldave
pinal@sqlauthority.com

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IDERA Live | MySQL Performance Troubleshooting with Limited Time and Resources

  • 1. 1© 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 1 Pinal Dave MySQL Performance Troubleshooting with Limited Time and Resources
  • 2. © 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 22 Agenda ▪ Basics of Optimizer ▪ Indexing ▪ Query Re-writing ▪ Best Practices ▪ Summary
  • 3. © 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 33 Understanding EXPLAIN Command ▪ Cost based optimizer ▪ Converts sub-optimal join types to efficient logic ▪ Reorder join tables ▪ Reducing constant expressions ▪ Optimizing algebraic rules ▪ Logic short circuit ▪ Optimal index usage
  • 4. © 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 44 Query Optimizer EXPLAIN SELECT Query
  • 5. © 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 55 Demo: Practical Performance Tuning Free Scripts: https://go.sqlauthority.com
  • 6. © 2016 IDERA, Inc. All rights reserved. Proprietary and confidential.© 2020 IDERA, Inc. All rights reserved. 66 THANKS! Any questions? You can find me at: @pinaldave pinal@sqlauthority.com