The document discusses various tools for developing and administering MySQL databases, including MySQL Workbench, MySQL Enterprise Monitor, MySQL for Visual Studio, and command line tools. MySQL Workbench is described as a unified visual tool for database design, development, and administration. Key features covered include modeling, SQL editing, server administration, and visual query execution plans. MySQL Enterprise Monitor provides real-time monitoring of MySQL performance and availability across multiple servers. MySQL for Visual Studio allows developing for MySQL within the Visual Studio integrated development environment. Common command line tools are also summarized.
QRTi is a "quality of service" measurement for each query, and it uses the Apdex formula for that calculation: http://en.wikipedia.org/wiki/Apdex
Optimum (1) : 100 ms.
Acceptable(0.5): 100-400 ms.
Unacceptable(0): > 400 ms.
If there are 100 executions of the digested/canonical query, where 60 finished below 100ms (the optimal time frame), 30 between 100ms and 400ms (the acceptable time frame), and the remaining 10 took longer than 400ms (unacceptable time), then the QRTi score is:
( (60 + (30 / 2) + (10*0) ) / 100) = 0.75.