A point-in-time /proc/meminfo reading. Every field maps to a line present
on all Linux kernels (MemTotal/MemFree/Buffers/Cached since 2.4,
MemAvailable since 3.14).
Summary
Types
@type t() :: %Sys.Linux.Proc.Meminfo.Snapshot{ available: Unit.Information.t(), buffers: Unit.Information.t(), cached: Unit.Information.t(), free: Unit.Information.t(), total: Unit.Information.t() }