ATLAS Pixel Detector during Run 2

Silicon pixel detectors are at the core of the current and planned upgrade of the ATLAS detector at the Large Hadron Collider (LHC). During Run 2 of LHC the detector had to sustain many challenges in order to keep the performances and quality of data taking constant in time, against the increasing instantaneous luminosity, increasing pile-up, and radiation damage. This work presents how the operational parameters of the detectors were changed in order to keep the data acquisition, the occupancy, and the resolution evolution constant with time. The effects of the radiation damage on charge collection efficiency and their dependency with time are also presented.