Swap Usage

Doug Hardie
2015-07-30T00:41:33Z

I have several FreeBSD 9.3 systems that are using swap and I can?t figure out
what is doing it.  The key system has 6GB swap and currently it has over 2GB in
use.  ps shows only a kernel module [intr] with a W status.  Obviously that
isn?t using the space.  No other process shows a W in its status.  I suspect
this is somewhat related to the use of mmap in one application.  However, all of
the mmaps in that application are file backed and thus shouldn?t use swap.  How
do I figure out what that swap space is being used for?