Operation Manual
b
Shows the amount of processes waiting for a resource other than a CPU. A high
number in this column may indicate an I/O problem (network or disk).
swpd
The amount of swap space currently used.
free
The amount of unused memory.
inact
Recently unused memory that can be reclaimed. This column is only visible when
calling vmstat with the parameter -a (recommended).
active
Recently used memory that normally does not get reclaimed. This column is only
visible when calling vmstat with the parameter -a (recommended).
buff
File buffer cache in RAM. This column is not visible when calling vmstat with
the parameter -a (recommended).
cache
Page cache in RAM. This column is not visible when calling vmstat with the
parameter -a (recommended).
si
Amount of data that is moved from RAM to swap per second. High values over a
longer period of time in this column are an indication that the machine would
benet from more RAM.
so
Amount of data that is moved from swap to RAM per second. High values over a
longer period of time in this column are an indication that the machine would
benet from more RAM.
bi
Number of blocks per second received from a block device (e.g. a disk read). Note
that swapping also impacts the values shown here.
System Monitoring Utilities 175