These are the calculations I make to get the numbers for the green, blue and yellow bars in the memory meter:
- Total used memory =
MemTotal-MemFree - Non cache/buffer memory (green) = Total used memory - (Buffers + Cached memory)
- Buffers (blue) =
Buffers - Cached memory (yellow) =
Cached+SReclaimable-Shmem - Swap =
SwapTotal-SwapFree
In the htop source code: linux/LinuxProcessList.c and linux/Platform.c.
