Hi, guys for the past 3 months my server has two hard system freezes at nights... I mean i can't access GUI or SSH. Last time was yesterday after 30 retries i finally get to SSH session but was almost unusable. I cant even control it via hdmi console... So i have to press power button of my server and wait for graceful shutdown. Any ideas or some starting point how to identify what cause it...

Unraid 7.0.0

Mirror and post your syslog or anything would just be a WAG

This is the syslog from yesterday freeze... i think the problem started around 23:30 to 00:00

syslog.txt

Nov 7 23:34:53 CUBE php-fpm[3065438]: [WARNING] [pool www] child 2242237 exited on signal 9 (SIGKILL) after 45.928328 seconds from start

Nov 7 23:34:57 CUBE php-fpm[3065438]: [WARNING] [pool www] child 2242251 exited on signal 9 (SIGKILL) after 55.501319 seconds from start

Nov 7 23:35:00 CUBE php-fpm[3065438]: [WARNING] [pool www] child 2242461 exited on signal 9 (SIGKILL) after 53.115950 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