SWAP fills up to 100%

hebein

On the dashboard my swap space fills up to 100%.
I have a Netgate SG5100, SW 21.05.2-RELEASE (amd64)
Can I disable the swap / do I need it and if yes, where can I disable?

viragomann

@hebein
If the swap is full also the memory will already exhaust. So check what eats up all the memory.

You can check the processes ordered by mem usage in the console by

top -n -o res

hebein

@viragomann I get

last pid: 57940;  load averages:  1.05,  0.84,  0.76  up 10+16:45:18    15:03:07
61 processes:  1 running, 60 sleeping
CPU:  0.7% user,  2.1% nice,  1.4% system,  0.0% interrupt, 95.9% idle
Mem: 414M Active, 1252M Inact, 175M Laundry, 653M Wired, 267M Buf, 1396M Free
Swap: 373M Total, 95M Used, 278M Free, 25% Inuse

  PID USERNAME    THR PRI NICE   SIZE    RES STATE    C   TIME    WCPU COMMAND
32598 root          9  40   20   690M   612M nanslp   1  39:21   2.93% suricata
31271 root          9  40   20   529M   430M nanslp   0  40:56   2.64% suricata
20145 root          3  20    0   328M   265M select   2   4:05   0.00% pcscd
77945 root          8  40   20   218M   170M nanslp   0  25:23   1.46% suricata
79782 root          9  40   20   178M   132M nanslp   2  25:18   1.46% suricata
15240 unbound       4  20    0    81M    31M kqread   1   4:58   0.00% unbound
  356 root          1  52    0   107M    28M piperd   1   0:24   1.17% php-fpm
  357 root          1  52    0   104M    26M accept   1   0:16   0.10% php-fpm
67210 root          1  52    0   104M    25M accept   3   0:12   0.78% php-fpm
51204 root          1  52    0   104M    25M accept   0   0:14   0.29% php-fpm
  355 root          1  20    0   102M    16M kqread   2   0:19   0.00% php-fpm
28573 root          1  20    0    29M  5696K kqread   2   0:15   0.00% nginx
36387 dhcpd         1  20    0    23M  5164K select   3   1:52   0.00% dhcpd
28318 root          1  20    0    29M  4880K kqread   0   0:00   0.00% nginx
 7451 root          1  20    0    15M  4828K nanslp   2   2:11   0.00% vnstatd
28103 root          1  52    0    28M  4764K pause    0   0:00   0.00% nginx
81682 root         85  20    0    58M  4712K uwait    0   0:07   0.00% filterdns
67572 root          2  20    0    17M  4612K select   0   0:06   0.00% openvpn

viragomann

@hebein
So your system has only 2 G RAM and you're running Suricata?

What do you except of Suricata?

stephenw10

The 5100 has 4G by default.

I also see pcscg using RAM though which is a known bug: https://redmine.pfsense.org/issues/12095
It's fixed in 22.01 or you can apply this patch to 21.05.2:
https://redmine.pfsense.org/issues/11933#note-7

Steve

hebein

@stephenw10 When are release candidates usually released. I would like to wait for the official release if possible.

Regards,
Gunther

stephenw10

22.01 will be "real soon now".
I would probably keep an eye on the RAM usage and just wait for it.

Or you can apply the patch to 21.05.2 to prevent pcscd being started at boot.

Steve