Upgrading RAM on a Deciso "OPNsense Ghz small" box

[moware]

I have a Deciso OPNsense Ghz small box, which has served me well over the last few years.

However, we seem to be hitting the 2GB RAM limit recently: Every now and then, suricata will crash after downloading new rule sets:

Code: [Select]

...
2021-07-31T20:10:07 /rule-updater.py[9914] download completed for https://rules.emergingthreats.net/open/suricata-4.0/emerging.rules.tar.gz
2021-07-31T20:10:29 kernel pid 4369 (suricata), jid 0, uid 0, was killed: out of swap space
...

There is no swap partition enabled (which makes sense, since the system only contains an SD card (16 GB) as permanent storage), so my first thought was to upgrade RAM. I imagine that going from 2 to 4 GB would be the easiest (= least work for me) and probably also the cheapest way to fix this. (Please do tell me if you disagree and recommend something else instead.)

So, my plan would be to (a) open up the device, (b) find out the brand and type of the mainboard, (c) check the mainboard docs for compatible RAM, (d) buy it and (e) replace the RAM.

My question to you, dear community:

• Anything wrong with this plan? Has anybody already done this successfully/unsuccessfully?
• Is the mainboard and/or supported RAM for this device documented anywhere (I did not find it in the spec section of the Deciso/applianceshop link mentioned above), so that I can skip steps a-c?

Thanks, best regards

[moware]

To answer my own question:

The OPNsense Ghz small box has a APU.1D board with on-board RAM that cannot be upgraded.