Hi,

I do not know if this helps here. I faced also memory problems on the
older Raspberry generations. Enabling swap helped even with no swap
in use.

Maybe, you also try it.

Erich


 On Sun, 11 Feb 2018 20:56:02 -0800 Ask Bjørn Hansen
<a...@develooper.com> wrote:

> Hi,
> 
> I have an old Soekris system with 64MB memory that I upgraded from
> 10.3 to 11.1 recently. Since then it’s started hanging every few days.
> 
> Today I happened to have a “top” instance running on the serial
> console. The system is minimally responsive to the network (ICMP and
> CARP are working, but no services).
> 
> From the top output it’s not clear what resource it’s out of.
> There’s no swap configured, but that what it looks like it’s trying
> to do? 
> 
> The ‘pf purge’ process is suspicious. There are no pf rules
> configured on the system (it should be all disabled).
> 
> Any suggestions?  (Other than “seriously … 64MB memory?!”).
> 
> 
> 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
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