linux vmstat使用说明

FIELD DESCRIPTION FOR VM MODE
   Procs
       r: The number of processes waiting for run time.
表示运行队列,就是说多少个进程真的分配到CPU
       b: The number of processes in uninterruptible sleep.
阻塞的进程数

   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). 从磁盘换入内存的大小

       so: Amount of memory swapped to disk (/s). 从内存换到磁盘的大小

   IO
       bi: Blocks received from a block device (blocks/s).
       bo: Blocks sent to a block device (blocks/s).

   System
       in: The number of interrupts per second, including the clock.
       cs: The number of context switches per second.

   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.


[oracle@june ~]$ vmstat 1 10
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
15  0  90432  12384 103336 475724    1    1   143   126   45   51  5  5 88  2  0
 8  0  90432  15036 103336 475724    0    0     4     8 1008  277 24 76  0  0  0
15  0  90432  11472 103336 475728    0    0    56    68 1552  461 24 76  0  0  0
13  1  90432  16732 103344 475740    0    0    52   276 1189  386 21 79  0  0  0
15  0  90432  34044 103344 475740    0    0    32    60 1041  312 14 86  0  0  0
13  0  90432  26852 103344 475748    0    0    24     4 1013  248 24 76  0  0  0
13  0  90432  18668 103344 475748    0    0     4     4 1018  274 28 72  0  0  0
14  1  90432  13832 103344 475756    0    0    68    48 1244  360 16 84  0  0  0
15  1  90432  20900 103348 475752    0    0    28   304 1027  328 19 81  0  0  0
14  1  90432  28092 103348 475768    0    0    44    16 1021  274 17 83  0  0  0