  We study generic objects in triangulated categories and characterize the
finite dimensional algebras $A$ such that the derived categories $D(\Mod A)$
are generically trivial. This is an analogue of a result of Crawley-Boevey for
module categories. As a consequence, we show that $D(\Mod A)$ is generically
trivial if and only if the category of perfect complexes $K^b(\proj A)$ is
locally finite.
