50 percent swap used, but "ps auxww" output shows no processes swapped out

[Eugene Grosbein]

04.02.2018 4:14, Michael Voorhis wrote:

> I've got an amd64 system running 11.1-STABLE r325027, with something
> like 20G of swap. "swapinfo" shows that half the swap is used.
> 
> So of course I'm curious to know which processes have been swapped
> out. I'm not using any "tmpfs" filesystems; no ZFS, no huge amounts of
> wired-down memory. The system's got 16 processors and 128G of RAM. "ps
> auxww" output shows *no* processes that are swapped out (2nd character
> in "STAT" field is "W"). Not a single one. The only process with a W in
> the stat field at all is the "[intr]" kernel thread.
> 
> What is using the swapspace?

These 10G may be just several pages of several processes.
Please show output of "top -ores -d1".