The Performance Schema is a system database which makes it easy to gather performance metrics and query them using SQL. The data is stored in temporary tables and views, with little or no persistent disk storage.

To learn more about tuning MySQL performance, you can take the MySQL Performance Tuning course. This 4-day course is available in the following formats:

• Training-on-Demand: Start training within 24 hours of registration. Follow lectures at your own pace through streaming video and book time on a lab environment to suit your own schedule.
• Live Virtual Event: You can attend a live event from your own desk, no travel required. There are events on the schedule to suit different timezones including the following start dates in 2015: 6 and 13 January, 25 February, 24 March, 7 April, and 19 May.
• In-Class Event: Travel to an education center to attend a class. Below is a selection of the events already on the schedule:

To register for an event or learn more about the authentic MySQL curriculum, go to http://education.oracle.com/mysql.