vm_fault: pager read error, pid 88715 (rrdtool)
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I'm running pfsense version 2.8.0 virtualized on xcp-ng 8.3.0.
The host has 64 GB RAM (two 32 GB dual channel DDR4 modules) with a 1Tb Nvme drive and 1tb samsung SSD.
I have 5 virtualized systems on the xcp-ng host consuming a total of 30Gb of the 64 GB.
One of my virtualized hosts is pfSense 2.8.0. Recently the pfSense host is giving me consistent error messages such as the following:
Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool) Aug 25 07:46:28 kernel vm_fault: pager read error, pid 24443 (rrdtool)Doing some reading on the error (https://www.reddit.com/r/opnsense/comments/1jlfshn/vm_fault_pager_read_error_pid_76098_rrdtool/), it could indicate a bad RAM module?? I'm just not sure. Is RAM presented to the pfsense host as virtual memory? Other than doing a mem86+ test on the RAM modules of the xcp-ng host, is there any other way to debug this error? I don't see errors from any other of the virtualized linux operating systems, however is there something I should be checking on the other virtualized systems or the host that would confirm a possible memory error as error (assuming its a memory error)?
Thanks for any input.
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@kevdog a memtest is going to check the physical memory for any issues, if you're not seeing any other errors on other VMs I would lean more towards this VM having some kind of corruption issue.
A memtest won't hurt and it would help to eliminate a possible issue, it would definitely take some time to complete, which may not be an option if you have any sort of uptime requirements.
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@DustinB I have time to run a ram check (luckily), and if not I'll just recreate VM. Luckily pfsense makes it pretty easy to reinstall from scratch by saving to a configuration file which can be imported to new version. I'll work on it later today or tomorrow and report back.