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 ...
