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MySQL 8 Cookbook

You're reading from   MySQL 8 Cookbook Over 150 recipes for high-performance database querying and administration

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Product type Paperback
Published in Jan 2018
Publisher
ISBN-13 9781788395809
Length 446 pages
Edition 1st Edition
Tools
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Author (1):
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Karthik Appigatla Karthik Appigatla
Author Profile Icon Karthik Appigatla
Karthik Appigatla
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Table of Contents (15) Chapters Close

Preface 1. MySQL 8 - Installing and Upgrading 2. Using MySQL FREE CHAPTER 3. Using MySQL (Advanced) 4. Configuring MySQL 5. Transactions 6. Binary Logging 7. Backups 8. Restoring Data 9. Replication 10. Table Maintenance 11. Managing Tablespace 12. Managing Logs 13. Performance Tuning 14. Security

Analyzing slow queries using pt-query-digest

pt-query-digest, which is part of the Percona Toolkit, is used for analyzing queries. The queries can be collected through any of the following:

  • Slow query log
  • General query log
  • Process list
  • Binary log
  • TCP dump

Installation of the Percona Toolkit is covered in Chapter 10, Table Maintenance, Installing Percona Toolkit section. In this section, you will learn how to use pt-query-digest. There are drawbacks for each method. The slow query log does not include all queries unless you specify long_query_time as 0, which drastically slows down a system. The general query log does not include query time. You cannot get complete queries from the process list. Only writes can be analyzed using binary log and using TCP dump causes server degradation. Usually, this tool is used on the slow query log with a long_query_time of 1...

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