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:
https://www.howtogeek.com/449691/what-is-swapiness-on-linux-and-how-to-change-it/
https://askubuntu.com/questions/103915/how-do-i-configure-swappiness
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.
Best
Jay
P.S.: Welcome to Cloudron!