February 7, 20242 yr Hi My Server keeps crashing and i have no idea what causes the crash. I have upgraded my hardware from AMD Ryzen 3900X intel 14700K. Since the hardware upgrade i am in the process to convert my filesystem til ZFS from XFS and im using Unbalanced to free the disk before formatting. Can one of you guys take a look at the syslog and point to the direction of what causing the crash. On this crash i was moving 1,2 tb 4K movies from one disk to another. The crash today starts at line 3975. I changed the docker network yesterday from macvlan to ipvlan Thanks in advance SysLog.txt Edited February 9, 20242 yr by STEFAN1987 more details added
February 7, 20242 yr Solution Did you reboot after changing to ipvlan? Also there are a lot of OOM errors.
February 7, 20242 yr Author I dont think i rebooted, as i recall i just started the docker service again. I actually had the thought that the 32 gb of memory was the issue, but i was only using 75% of the total memory, but always 100% ZFS memory usage. i have allocated 50% of the memory to ZFS ARC
February 7, 20242 yr 20 minutes ago, STEFAN1987 said: I dont think i rebooted, You should reboot, it can still crash after the change., well it's anew boot now after the crash, make sure it's still using ipvlan and retest.
February 7, 20242 yr Author Okay that would be amazing if that was the reason. and if it keeps crashing more memory could be a solution?
February 7, 20242 yr Not necessarily, the issue might not be not enough RAM, but more about fragmented RAM, clean the old syslog and start a new one form this point on, so we see only any new errors.
February 7, 20242 yr Author My ZFS Memory usage keeps being at 100%, can that be a part of the crashes?
February 7, 20242 yr That's normal, ARC will use all available RAM, but ARC size is limited, default to 1/8 total RAM.
February 9, 20242 yr Author Seems like the reboot did the trick. but i also lowered the dedicated ZFS ARC allocation from 1/2 to 1/4 of the memory. Thanks @JorgeB for you support it is much appreciated
February 9, 20242 yr It's not a problem using more RAM for the ARC, as long as you leave enough for VMs and other services, also note that it's never a problem if the VMs are started before the ARC is full, ARC will only use as much RAM as it can, but it can be a problem if they are started when the ARC is already full, and the amount of free RAM is less that the one allocated to the VM, the kernel will try to downsize the ARC, but the ARC can take longer than needed to free up the RAM, and result in the VM crashing on start, in one of my servers the ARC is set to 95% of total RAM, since I don't run any VMs or containers with that server.
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