memory used as buffers (KB).
swapped from the disk (KBps).
swapped to the disk (KBps).
from a block device (blocks/s).
interrupts per second, including the clock.
running non-kernel code (user time, including nice time).
running kernel code (system time).
– id: Time spent idle.
Prior to Linux 2.5.41, this included IO-wait time.
waiting for IO. Prior to Linux 2.5.41, this appeared as zero.