手册页中的vmstat
状态,例如 wa 部分,“等待 IO 所花费的时间”,但是时间单位是什么?是几秒钟吗?
答案1
阅读整个手册页:
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, included in idle.
st: Time stolen from a virtual machine. Prior to Linux 2.6.11, unknown.
这些都是总 CPU 时间的百分比。