The big guys are likely all monitoring it extensively. Knew a guy at one of the big guys and they had a google maps style web interface where you could view an

The big guys are likely all monitoring it extensively. Knew a guy at one of the big guys and they had a google maps style web interface where you could view and monitor in real time the temperature of every rack throughout every datacenter and then even zoom into individual racks to view each servers temperature. It was also automated so that techs would get issues assigned to them to investigate servers/racks that were running too hot or getting throttled in order to try and fix the issue.