Run vmstat -S to show swapping statistics.
$ vmstat -S kthr memory page disk faults cpu r b w swap free si so pi po fr de sr dd f0 s1 -- in sy cs us sy id 0 0 0 862608 364792 0 0 1 0 0 0 0 0 0 0 0 406 394 213 1 0 99
The swapping statistics fields are described in the following list. For a description of the other fields, see Table 3–2.
Average number of LWPs that are swapped in per second
Number of whole processes that are swapped out