This is not a review, but I think the isolation tests should be expanded. At least, include the case of serializable transactions being involved.
-- Álvaro Herrera Breisgau, Deutschland — https://www.EnterpriseDB.com/ "Pensar que el espectro que vemos es ilusorio no lo despoja de espanto, sólo le suma el nuevo terror de la locura" (Perelandra, C.S. Lewis)