What does it mean if you see a high percentage of signal waits? Thanks to Microsoft whitepapers, presentations, and blogs, everybody would say it implies CPU pressure.   Well, almost everyone except Mario Broodbakker, whose excellent blog “Taking the guesswork out of SQL Server performance profiling Part 2” shows us that SQL Server signal ...

Regardless of the DBMS make or model, the transaction throughput curve of a database system is often shaped like a trapezoid. As the load level goes up initially, so does the transaction throughput. As the load level continues to go up, the transaction throughput will reach a plateau. After the load level is cranked up still further, the ...