Sveta Smirnova

MySQL Troubleshooting (eBook, PDF)

What To Do When Queries Don't Work

• Format: PDF

Produktbeschreibung

Stuck with bugs, performance problems, crashes, data corruption, and puzzling output? If youre a database programmer or DBA, theyre part of your life. The trick is knowing how to quickly recover from them. This unique, example-packed book shows you how to handle an array of vexing problems when working with MySQL.Written by a principal technical support engineer at Oracle, MySQL Troubleshooting provides the background, tools, and expert steps for solving problems from simple to complexwhether data you thought you inserted doesnt turn up in a query, or the entire database is corrupt because of a server failure. With this book in hand, youll work with more confidence.Understand the source of a problem, even when the solution is simpleHandle problems that occur when applications run in multiple threadsDebug and fix problems caused by configuration optionsDiscover how operating system tuning can affect your serverUse troubleshooting techniques specific to replication issuesGet a reference to additional troubleshooting techniques and tools, including third-party solutionsLearn best practices for safe and effective troubleshootingand for preventing problems

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Produktdetails

• Verlag: O'Reilly Media
• Seitenzahl: 266
• Erscheinungstermin: 8. Februar 2012
• Englisch
• ISBN-13: 9781449330248
• Artikelnr.: 42124242

Autorenporträt

Sveta Smirnova is a Principal Technical Support Engineer in the BugsAnalysis Support Group at MySQL at Oracle. She works on trickysupport issues and MySQL software bugs on a daily basis. Before starting at MySQL in 2006, she worked as web developer on severalclosed CRM systems. She is an active participant in the open sourcecommunity. Her main interests in recent years is solving DBA problems and finding ways to semi-automate this process.

Inhaltsangabe

Foreword
Preface
Audience
How to Solve a Problem
How This Book Is Organized
Some Choices Made in This Book
Conventions Used in This Book
Using Code Examples
Safari® Books Online
How to Contact Us
Acknowledgments
Chapter 1: Basics
1.1 Incorrect Syntax
1.2 Wrong Results from a SELECT
1.3 When the Problem May Have Been a Previous Update
1.4 Getting Information About a Query
1.5 Tracing Back Errors in Data
1.6 Slow Queries
1.7 When the Server Does Not Answer
1.8 Issues with Solutions Specific to Storage Engines
1.9 Permission Issues
Chapter 2: You Are Not Alone: Concurrency Issues
2.1 Locks and Transactions
2.2 Locks
2.3 Transactions
2.4 Metadata Locking
2.5 How Concurrency Affects Performance
2.6 Other Locking Issues
2.7 Replication and Concurrency
2.8 Effectively Using MySQL Troubleshooting Tools
Chapter 3: Effects of Server Options
3.1 Service Options
3.2 Variables That Are Supposed to Change the Server Behavior
3.3 Options That Limit Hardware Resources
3.4 Using the --no-defaults Option
3.5 Performance Options
3.6 Haste Makes Waste
3.7 The SET Statement
3.8 How to Check Whether Changes Had an Effect
3.9 Descriptions of Variables
Chapter 4: MySQL's Environment
4.1 Physical Hardware Limits
4.2 Operating System Limits
4.3 Effects of Other Software
Chapter 5: Troubleshooting Replication
5.1 Displaying Slave Status
5.2 Problems with the I/O Thread
5.3 Problems with the SQL Thread
Chapter 6: Troubleshooting Techniques and Tools
6.1 The Query
6.2 Effects of the Environment
6.3 Sandboxes
6.4 Errors and Logs
6.5 Information-Gathering Tools
6.6 Localizing the Problem (Minimizing the Test Case)
6.7 General Steps to Take in Troubleshooting
6.8 Testing Methods
6.9 Special Testing Tools
6.10 Maintenance Tools
Chapter 7: Best Practices
7.1 Backups
7.2 Gathering the Information You Need
7.3 Testing
7.4 Prevention
7.5 Think About It!
Information Resources
Resources Containing Information That Is Usually Useful
Bug and Knowledge Databases
Expert Knowledge Online
Places Where You Can Ask for Help
Books
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