Although Amdahl's Law explains the scalability of any system, real applications show quite different scalability results. After some research in the area, Neil Gunther found that, despite serialization, there is another, more crucial point, which is called incoherence.
Neil Gunther is a computer information systems researcher who is best known internationally for developing the open source performance modelling software Pretty Damn Quick and developing the Guerrilla approach to computer capacity planning and performance analysis. For more information, visit http://www.perfdynamics.com/Bio/njg.html.
Incoherence is a common phenomenon in a concurrent system with shared resources. For instance, from a standard Java ...
