A computer-implemented method for improving availability of a server set (101, 102, 103) of one or more servers (201 - 216) in a system, the system comprising a shared power supply system that comprises a plurality of power distribution units (111, 112, 113), wherein each of the plurality of power distribution units (111, 112, 113) provides a power supply unit feed (121A, 121B, 121C, 122A, 122B, 122C) to the server set (101, 102, 103), wherein each of the power supply unit feeds (121A, 121B, 121C, 122A, 122B, 122C) provides a server set power feed (231, 232) to the server set (101, 102, 103), respectively, wherein each of the server set power feeds (231, 232) provides power to a power supply unit set constituting a plurality of power supply units (221, 222, 223), respectively, wherein the plurality of power supply unit sets each provide power to the server set (101, 102, 103), the computer-implemented method being performed by one or more processors executing computer executable instructions for the computer-implemented method, and the computer-implemented method comprising: detecting that a first power supply unit set of the plurality of power supply unit sets is no longer capable of solely providing all of the power that the server set (101, 102, 103) is consuming or anticipated to consume, including detecting that the first power supply unit set powered by a first server set power feed (231, 232) of the server set power feeds (231, 232) would be insufficient to provide all power that the servers (201 - 261) are consuming or are anticipated to consume should other server set power feeds (231, 232) of the server set power feeds (231, 232) lose power, wherein a lack of anticipated capability of the first power supply unit set is due to a lost capability of at least one power supply unit (221, 222, 223) that receives power from the first server set power feed (231, 232); based on the detecting, identifying one or more actions that would lower power consumption of the server set (101, 102, 103) such that if all of the plurality of power supply unit sets were to be lost except for the first power supply unit set, the power consumption of the server set (101, 102, 103) could be met by the first power supply unit set; and automatically performing the identified one or more actions to reduce power usage of the server set (101, 102, 103), the identified one or more actions comprising reducing fan speed, reducing processor utilization, reducing disk drive spin speed or disk drive power consumption. detecting that a first power supply unit set of the plurality of power supply unit sets is no longer capable of solely providing all of the power that the server set (101, 102, 103) is consuming or anticipated to consume, including detecting that the first power supply unit set powered by a first server set power feed (231, 232) of the server set power feeds (231, 232) would be insufficient to provide all power that the servers (201 - 261) are consuming or are anticipated to consume should other server set power feeds (231, 232) of the server set power feeds (231, 232) lose power, wherein a lack of anticipated capability of the first power supply unit set is due to a lost capability of at least one power supply unit (221, 222, 223) that receives power from the first server set power feed (231, 232); based on the detecting, identifying one or more actions that would lower power consumption of the server set (101, 102, 103) such that if all of the plurality of power supply unit sets were to be lost except for the first power supply unit set, the power consumption of the server set (101, 102, 103) could be met by the first power supply unit set; and automatically performing the identified one or more actions to reduce power usage of the server set (101, 102, 103), the identified one or more actions comprising reducing fan speed, reducing processor utilization, reducing disk drive spin speed or disk drive power consumption.