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  @btx 

Hey mate

Perhaps it's the network engineer in me, but I totally disagree with that.     A 4gb Pi is like what, €45?  that will be good for another 4-6 years it seems like a done deal to me.  

Chugging a load of swop file at it, while this may work it's only a fudge in my opinion.  Ultimately if you had sufficient hardware then you wouldn't need to start increasing swop files.   Yes I have done that before for other things previously, but as you say yourself SDs are not reliable for swop and you may well start burning them.     Yes a radxa's rock  with a M2 would be more than perfect, but as you say its going to cost more than a Pi 4gb or a OC200.

For all the cost involved of replacing a 6 year old piece of hardware, just seems a waste of time personally.    Yes the OC200 is more expensive, but again it's not mega money

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  @btx 

As I was reading your reply I thought, "this is like being in work!"..    Pretty much sums up the daily debate between dev and networks.

Again you are also correct too, it would be good to have the option to stop certain services and features on-demand.  I know on one of the other vendors you could stop the tomcat server, that would bring down the RAM and CPU massively but still allow the controller to function, all be it without GUI.  When you needed it you could SSH in and re-start it.   Things like that are perfect for this, but seems unlikely to happen sadly. 

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  @btx thank you for the input on this issue. I really appreciate it!

I just went and bought a rpi4 with 8gb ram to throw money at the problem :'D 

And it worked very nicely.

I'm sure I find another purpose for the rpi3 soon

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  @btx you seam really nice.

I was really happy with the rpi3 running omada controller version 4. But I like to stay up to date.

Did you change the swap file on all of those rpi3s?