Hello,

I'm trying to figure out why my containers become randomly unavailable throughout the day. I'm not sure if it's all containers, but I have uptime kuma reporting after the fact that containers that are monitored were down.

I've run netdata, but it's data isn't available when containers are down. I mostly notice it more when watching via jellyfin, but it can happen throughout the day when nothing is happening.

The attached diagnostics is from just after the last event, so hopefully there's enough data in there.

tower-diagnostics-20251215-1032.zip

Dec 15 10:31:30 Tower php-fpm[10494]: [WARNING] [pool www] child 24596 exited on signal 9 (SIGKILL) after 44.851350 seconds from start

Dec 15 10:31:34 Tower php-fpm[10494]: [WARNING] [pool www] child 24628 exited on signal 9 (SIGKILL) after 44.612376 seconds from start

Dec 15 10:31:36 Tower php-fpm[10494]: [WARNING] [pool www] child 24779 exited on signal 9 (SIGKILL) after 44.195213 seconds from start

In my experience, these errors can be the result of the server being close to exhausting the memory, GUI can become extremely slow, like 1 minute to open the dashboard, try limiting the memory for VMs/docker services, or adding a little more RAM.

It could also be one or more containers hogging the CPU, try pinning only some cores to them, and leave cores 0/1 available for Unraid.

Also, recommend trying a couple of other things, go to Settings - Global share settings and set the Number of fuse File Descriptors to the max, and enable this:

https://docs.unraid.net/unraid-os/release-notes/7.0.0/#excessive-flash-drive-activity-slows-the-system-down

Thanks, I took a look at that page last week and implemented that workaround. We'll see how that works now.

I'll have to take some time and start pining some of the major hitters and see if that helps.

Just to close the loop on this.

I did pin my heavy hitters and still working on the rest of them as time permits and it seems to have helped a lot. It's gone from occurring on a daily basis to every few days, so we're on the right track.