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Date:      Sun, 11 Feb 2018 20:56:02 -0800
From:      =?utf-8?Q?Ask_Bj=C3=B8rn_Hansen?= <ask@develooper.com>
To:        freebsd-stable@freebsd.org
Subject:   FreeBSD on 64MB memory
Message-ID:  <5FB97479-C49D-4C6E-8416-015ECA656C14@develooper.com>

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Hi,

I have an old Soekris system with 64MB memory that I upgraded from 10.3 =
to 11.1 recently. Since then it=E2=80=99s started hanging every few =
days.

Today I happened to have a =E2=80=9Ctop=E2=80=9D instance running on the =
serial console. The system is minimally responsive to the network (ICMP =
and CARP are working, but no services).

=46rom the top output it=E2=80=99s not clear what resource it=E2=80=99s =
out of.  There=E2=80=99s no swap configured, but that what it looks like =
it=E2=80=99s trying to do?=20

The =E2=80=98pf purge=E2=80=99 process is suspicious. There are no pf =
rules configured on the system (it should be all disabled).

Any suggestions?  (Other than =E2=80=9Cseriously =E2=80=A6 64MB =
memory?!=E2=80=9D).


Ask


last pid:  2228;  load averages:  0.63,  0.65,  0.70  up 0+21:13:56    =
04:50:47
36 processes:  2 running, 33 sleeping, 1 waiting
CPU:  0.1% user,  0.0% nice, 11.3% system,  2.4% interrupt, 86.2% idle
Mem: 1616K Active, 10M Inact, 28M Wired, 3099K Buf, 1768K Free
Swap:

  PID    UID    THR PRI NICE   SIZE    RES STATE    TIME    WCPU COMMAND
   11      0      1 155 ki31     0K     8K RUN     16.8H  75.53% idle
    0      0      7 -16    -     0K    64K swapin 155:10  12.00% kernel
   16      0      3 -16    -     0K    24K psleep  10:04   8.15% =
pagedaemon
   12      0     14 -64    -     0K   112K WAIT    27:21   2.80% intr
    6      0      1 -16    -     0K     8K pftm     8:56   0.73% pf =
purge
 1027      0      1  20    0  7272K  1140K RUN      6:04   0.52% top
    7      0      1 -16    -     0K     8K -        2:57   0.18% =
rand_harvestq
   21      0      1  16    -     0K     8K syncer   0:22   0.05% syncer
   22      0      1  21    -     0K     8K vlruwt   0:07   0.01% vnlru
   19      0      1  20    -     0K     8K psleep   0:08   0.01% =
bufdaemon
  788      0      1  20    0  5920K  1752K select   0:04   0.01% syslogd
   20      0      1  20    -     0K     8K -        0:07   0.01% =
bufspacedaemon
  911      0      1  20    0  8816K  8844K kmem a  43:41   0.00% ntpd
  996      0      1  20    0 13628K  4620K kmem a   0:06   0.00% sshd
  985      0      1  20    0  5952K   584K kmem a   0:07   0.00% cron
  709      0      1  20    0  7300K  3364K kmem a   0:01   0.00% devd
 2227      0      1  24    0  5952K  1232K kmem a   0:00   0.00% cron=20=



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