您可以查询 performance_schema 数据库中的表，以查看您的服务器及其运行应用程序的性能特征的实时信息。有关详细信息，请参见 第 29 章，MySQL 性能模式。You can query the tables in the performance_schema database to see real-time information about the performance characteristics of your server and the applications it is running. See Chapter 29, MySQL Performance Schema for details.