freebsd stable - Feb 2018 - 50 percent swap used, but "ps auxww" output shows no processes swapped out

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".

On 02/03/2018 05:48 PM, Eugene Grosbein wrote:
> These 10G may be just several pages of several processes.
> Please show output of "top -ores -d1".
This just shows a bunch of hungry postgres processes (see below).

In response to your slightly-earlier email, swap_enabled is set (its
default) and swap_idle_enabled is NOT set.  No swap-related sysctl's are
set in /etc/sysctl.conf.

1 frame of your requested "top" output, sorted as specified:
> last pid: 47195;  load averages:  0.17,  0.37,  0.44                       
up 99+20:40:41  18:37:07
> 369 processes: 1 running, 368 sleeping
> CPU:  0.2% user,  0.0% nice,  0.2% system,  0.0% interrupt, 99.7% idle
> Mem: 6989M Active, 79G Inact, 27G Laundry, 10G Wired, 1568M Buf, 1680M Free
> Swap: 21G Total, 11G Used, 10G Free, 50% Inuse
> 
>   PID USERNAME    THR PRI NICE   SIZE    RES STATE   C   TIME    WCPU
COMMAND
> 61839 pgsql         1  21    0 32665M 31349M select 13   3:13   0.00%
postgres
> 59354 pgsql         1  20    0 32659M 26625M select 12 288:57   0.00%
postgres
> 40354 pgsql         1  20    0 32660M 26182M select 12 220:15   0.00%
postgres
> 24708 pgsql         1  20    0 32659M 26144M select  3 204:14   0.00%
postgres
> 37664 pgsql         1  20    0 32649M 25967M select 12  48:55   0.00%
postgres
> 56094 pgsql         1  25    0 32659M 25734M select  5 189:00   0.00%
postgres
> 57255 pgsql         1  20    0 32661M 25414M select  6 143:53   0.00%
postgres
> 38662 pgsql         1  20    0 32659M 23669M select  1 229:03   0.00%
postgres
> 48035 pgsql         1  20    0 32663M 22195M select  3 149:13   0.00%
postgres
> 66831 pgsql         1  20    0 32659M 21944M select  2  61:00   0.13%
postgres
> 45832 pgsql         1  20    0 32659M 21427M select  4 158:26   0.00%
postgres
> 56976 pgsql         1  20    0 32661M 14110M select  1  56:26   0.00%
postgres
> 26207 pgsql         1  20    0 32659M 11620M select  8  34:21   0.00%
postgres
>   383 www          64  20    0 34010M  8860M nanslp 14  11:26   0.11% jsvc
> 44067 pgsql         1  20    0 32659M  6194M select 11  15:16   0.00%
postgres
> 31431 pgsql         1  20    0 32661M  4928M select 15  15:41   0.00%
postgres
> 34641 pgsql         1  20    0 32650M  2383M select 14   2:04   0.00%
postgres> [...]