| `.PhysicalTotalMemory` | `int` | is the total of used physical memory |
| `.PhysicalAvailableMemory` | `int` | is the total available physical memory (i.e. the amount immediately available to processes) |
| `.PhysicalFreeMemory` | `int` | is the total of free physical memory (i.e. considers memory used by the system for any reason [e.g. caching] as occupied) |
| `.PhysicalPercentUsed` | `float64` | is the percentage of physical memory in usage |
| `.SwapTotalMemory` | `int` | is the total of used swap memory |
| `.SwapFreeMemory` | `int` | is the total of free swap memory |
| `.SwapPercentUsed` | `float64` | is the percentage of swap memory in usage |
| `.Load1` | `float64` | is the current load1 (can be empty on windows) |
| `.Load5` | `float64` | is the current load5 (can be empty on windows) |
| `.Load15` | `float64` | is the current load15 (can be empty on windows) |
| `.Disks` | `[]struct` | an array of [IOCountersStat][ioinfo] object, you can use any property it has e.g. `.Disks.disk0.IoTime` |