iostat (FreeBSD 11.1/FreeNAS) 上的 ms/* 列是什么意思？我在手册页上没有看到任何详细信息，或者我误读了它们的含义
iostat -x
extended device statistics
device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen %b
da0 0 0 0.0 0.0 0 0 0 0 0 0
da1 0 283 0.0 9534.6 0 3 52 6 0 110
da2 0 264 0.0 7718.5 0 4 53 7 2 110
da3 0 0 0.0 0.0 0 0 0 0 0 0
da4 0 0 0.0 0.0 0 0 0 0 0 0
da5 0 0 0.0 0.0 0 0 0 0 0 0
da6 0 0 0.0 0.0 0 0 0 0 0 0
da7 0 0 0.0 0.0 0 0 0 0 0 0
da8 0 0 0.0 0.0 0 0 0 0 0 0
da9 0 0 0.0 0.0 0 0 0 0 0 0
da10 0 0 0.0 0.0 0 0 0 0 0 0
da11 0 0 0.0 0.0 0 0 0 0 0 0
cbb0 0 0 0.0 0.0 0 0 0 0 0 0
答案1
手册页最近已更新至新版本：
The extended iostat device display, with the -x flag specified,
shows the following statistics:
r/s read operations per second
w/s write operations per second
kr/s kilobytes read per second
kw/s kilobytes write per second
qlen transactions queue length
ms/r average duration of read transactions, in milliseconds
ms/w average duration of write transactions, in milliseconds
ms/o average duration of all other transactions, in milliseconds
ms/t average duration of all transactions, in milliseconds
%b % of time the device had one or more outstanding
transactions