Procs
r: The number of processes waiting for run time. 等待CPU的进程数
b: The number of processes in uninterruptible sleep. 不可中断睡眠的进程数
Memory
swpd: the amount of virtual memory used.
free: the amount of idle memory.
buff: the amount of memory used as buffers.
cache: the amount of memory used as cache.
inact: the amount of inactive memory. (-a option)
active: the amount of active memory. (-a option)
Swap
si: Amount of memory swapped in from disk (/s). 换进
so: Amount of memory swapped to disk (/s). 换出
IO
bi: Blocks received from a block device (blocks/s). 每秒读盘块数
bo: Blocks sent to a block device (blocks/s). 每秒写盘块数
System
in: The number of interrupts per second, including the clock. 每秒中断数
cs: The number of context switches per second. 每秒上下文切换数
CPU
These are percentages of total CPU time.
us: Time spent running non-kernel code. (user time, including nice time)
sy: Time spent running kernel code. (system time)
id: Time spent idle. Prior to Linux 2.5.41, this includes IO-wait time.
wa: Time spent waiting for IO. Prior to Linux 2.5.41, shown as zero. CPU等待IO所占百分比
st: Time spent in involuntary wait. Prior to Linux 2.6.11, shown as zero.
