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Next Section: ref、rows、usingFilesort
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SQL optimization and troubleshooting (MySQL version)
Chapter1 MySQL underlying principles
1-1 Course Introduction
1-2 Installation, start and stop of RPM version of MySQL under Linux
1-3 MySQL startup problems, configuration files, and encoding problems
1-4 MySQL layering and storage engine
Chapter2 SQL optimization
2-1 SQL parsing process, index, B-tree
2-2 B-tree and index
2-3 SQL optimization preparation
2-4 id, table in explain
2-5 Detailed explanation of type level
2-6 Index type and gradual optimization, key_len calculation method
2-7 ref、rows、usingFilesort
2-8 Extra field
Chapter3 Optimization case
3-1 Optimization example
3-2 Single table optimization and summary
3-3 Multi-table optimization
Chapter4 The principle of optimization failure
4-1 Avoid index failure principle
4-2 Other common optimization methods
Chapter5 SQL Troubleshooting-Slow Query Log
5-1 Slow query threshold and mysqldumpslow tool
5-2 Simulate and analyze massive data through profiles
5-3 Global query log
Chapter6 lock mechanism
6-1 Detailed explanation of lock mechanism
6-2 Write lock example and MyISAM mode features
6-3 Table lock situation analysis and row lock analysis
6-4 Precautions and usage analysis of row locks
6-5 Query row lock
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