I"m relatively new to self-hosting and I have an instance on Oracle cloud with a few apps that I run. More recently this instance is becoming unresponsive every 30 minutes or so. It becomes impossible to SSH to it and any connection to it is dropped. Oracle Cloud says that it is unresponsive, forcibly rebooting it fixes the issue until it becomes unresponsive again in 30 minutes. I believe the most major thing I did since this started was installing Java and doing an "apt update" followed by "apt upgrade" after many months of not doing it. I have tried to turn off every service that I have running using pm2 and systemctl. No luck. Are there any tools that I can use to better understand why it is freezing like that?

Edit: I ran the following command systemctl --type=service --state=running And noticed there was a Gnome Display Manager that was running and I wasn't using it. After disabling this service with systemctl disable [servicename] The server stopped crashing. Thanks for all the replies!

As you can see on the screenshot. Task Manager is saying that the Active Time of my NVM.e system drive has a lot of peaks that start to happen after a few minutes of using the PC and they won't go away unless I restart. I have tried so many things that I gave up and formatted the whole drive and reinstalled Windows from scratch. I have also tried the chkdsk command and this problem won't go away. This started to happen just a few days ago, out of the blue. The whole system freezes at every peak you see on the screenshot and the main tab of Task Manager reports the Disk Usage as being ~1%, so there is no process using the disk. Resource Monitor is also reporting the same thing.

Edit: I have narrowed down the problem to a insanely high Response Time on Resource Monitor (up to 2000ms). It is usually the “System” process that is having this high Response Time. Any way of fixing or at least knowing the root cause of this?

I selfhosted my Nextcloud and really enjoyed it for personal use. One of my friends took a look into it and thought that it could be a good thing for his company that employees +200 people and growing... They are currently using Google Workspace but want to ditch it completely in favor of something that they can control themselves. So here's my question, is it worth to use NextCloud on a company of this size, is there a better alternative? Or should they just keep using Megacorporation's cloud solutions? If it is worth it, how much should I charge them for hosting it and doing the implementation and support?