The Total in DB Highlights chart shows a general overview of the following metrics:

• Internal Wait - Analyze statements experiencing internal waits.
• I/O Wait - Analyze disks and storage devices experiencing high I/O waits.
• Lock Wait - Analyze current and historical locks.
• Using CPU - Analyze statements with high CPU consumption.
• OS Wait - Analyze statements experiencing OS waits.
• Tempdb I/O Wait - Analyze statements experiencing I/O waits on tempdb.
• Network I/O Wait - Analyze statements experiencing network waits.
• Log Wait - Analyze statements experiencing log waits.
• Remote Wait - Analyze statements experiencing waits for remote instances.