This book intends to enlighten readers on all things related to database benchmarking, stress testing, and workload capture/replay. At this moment you may feel that these are one and the same topic, or simply that what differentiates them is inconsequential. Moreover you may consider these topics as somewhat esoteric and thus more suited for academia and theoreticians, but not really relevant in the real world where you work. Finally, you might simply believe that the time and effort for performing such testing activities is unwarranted, or at least very difficult to justify. As a result, many people are skeptical about the true value of these activities. This book endeavors to transform that mistaken opinion or at least enlighten the reader as to the genuine value of these topics.