Welcome to the world of MySQL performance tuning. It is a world that sometimes can seem like it is dominated by black magic and luck, but hopefully this book can help you work in a structured way and methodically work your way to a better performance.
This chapter introduces you to MySQL performance tuning by talking about the whole stack as well as the importance of monitoring and basing your actions on data. Since this book is mainly about working with queries, the lifecycle of a query is reviewed before concluding the chapter.
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