Although I cannot assist with the original situation, I can explain the swap things:
@rosano said in How to balance with other apps?:
I think I did something to increase 'swap' memory once on the DigitalOcean box, but not sure how to verify that.
Easiest to check is:
root@my:~# free -h
total used free shared buff/cache available
Mem: 7.8Gi 2.9Gi 357Mi 167Mi 4.5Gi 4.4Gi
Swap: 4.0Gi 114Mi 3.9Gi
This shows the size of swap.
root@my:~# swapon --show
NAME TYPE SIZE USED PRIO
/apps.swap file 4G 114.1M -2
Shows the usage of swap ("USED")
Swappiness is also a thing you might want to take a look into, I thnk those two pages are helpful for you:
Regarding the Cloudron apps usage, it might be helpful to list all the apps you are running and also some more general facts (amount of users, intensity of usage, domains, e-mails, etc.) to get to kniow your usaecase and get a better feeling if this machine is the right one for what you're doing or might need an upgrade.
P.S.: Welcome to Cloudron!