This read-only Gauge32 field is the 'memAvailableMin' property of the 'FexSystemStats' managed object in Cisco UCS Manager's equipment-inventory schema capturing the lowest available-memory figure seen in the window. The lowest available-memory figure is the one to watch for a FEX under real memory pressure, since a sustained low MemAvailable, unlike low KernelMemFree alone, means the OS has already reclaimed what cache it could and is still short. A MemAvailableMin of 15MB recurring every day at the same hour would point to a periodic process or job on the FEX that is consuming memory it never fully releases.