September 2014
Intermediate to advanced
384 pages
9h 28m
English
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Chapter 3. Optimizing Queries
This chapter explains the basics of how to improve the performance of the queries that are executed on a MariaDB server. First, the important tools required to find slow queries are described. Once we find such queries, we will need to find out why they are slow. Thus, a description of how MariaDB uses indexes follows. Then, we will discuss the EXPLAIN command, which shows how MariaDB executes a query. Contextually, we will also discuss the main execution strategy.
The topics covered in this chapter are:
- The slow query log
- The
pt-query-digestcommand from Percona Toolkit - Indexes
- Table statistics
- The
EXPLAINstatement - Important MariaDB optimizations
The slow query log
The slow query log (or simply slow log) stores SQL statements ...
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