Selfhosted
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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High iowait and high used memory suggest that something has used up all the available memory and the system is swapping like mad to stay alive. I'm surprised the OOMKiller hasn't intervened at that point.
You need to monitor which process is using all the memory. The easiest way is probably to keep
htop
running in ascreen
ortmux
session, periodically connect, and look at which processes have the highest used memory.Superb. I will do that. Would increasing ram Capacity solve the issue? Also, does High IO wait time indicate issue with the boot drive (which is an SSD that is 4 years old)
Difficult to read the graph, but looks like you have less than 4GB ram. Depending what sort of OS and services are running (from above suggestions), this is likely the biggest issue.
You haven't mentioned which services you're running, but 4GB might be enough perhaps for a basic OS with NAS file share services. But anything heavier, like running Container services will eat that up. You'd want at least 8GB.
Note also that you may not have a dedicated graphics card? If you have integrated graphics, some ram is taken from System and shared with the GPU. If you're just running command line, you might eke out a little more RAM for system by reducing the VRAM allocation in your BIOS. See: https://en.m.wikipedia.org/wiki/Shared_graphics_memory