On Fri, Dec 27, 2019 at 08:49:02AM +0000, 'awokd' via qubes-users wrote:
Further inspection shows there's a LOT of disk I/O going on.
after installing iotop in dom0, this appears to be coming from command
[NN.xvda-0], presumably one of the VMs. How do I map the NN (number) to
a given running VM?
Check xl top. I think you can find the offending VM with that. You might
be running out of system RAM too, which would be shown at the top.
xl top / xentop doesn't show any two-digit number identifying a VM.
However by trial and error it looks like the extreme levels of disk I/O
are a symptom rather than a cause. After shutting down all slowed-down
VMs the disk I/O ended. Then when I re-started a DispVM with Firefox,
the high levels of disk I/O (constant read > 50MB/sec) came back and
Firefox was slow (as before).
Unfortunately I need to get work done so have to reboot to "just make it
go away" but I am still interested in troubleshooting ideas (for when it
happens next).
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