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I want to know if there is a command virsh to display the cpu and memory consumption of each machine virtual. I created the virtual machine using KVM in ubuntu system.

  • At a given time or for a period of time? – dawud May 31 '16 at 18:20
  • Something like virt-top ? – Martian Jun 1 '16 at 8:19
  • for a period of time – Nadya Nux Jun 1 '16 at 19:37
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The command dommemstat can give you memory stats for a specific domain and with domstats you can get plenty of stats for all domains or just the specified. You can pass the parameter --cpu-total to see the total in the moment.

First get a virsh interactive console by typing virsh on your command line and then, once inside virsh's console, issue the following command:

virsh # domstats --cpu-total

The previous command will give you the CPU stats for all domains. If you have virt-manager you can see live some graphs and other nice stats, and if you want to collect them for a time you would need some other tool, I would recommend collectd and its 'virt' plugin

  • i tried domstats --cpu-total and ` dommenstat , i got an error such as unknown command for domstats ` and and empty line for dommenstat I'm not sure what is the problem – Nadya Nux Jun 1 '16 at 19:33
  • dont forget to always check the shell/program from which the command has been run... meaning that the command as per the answer was run from within virsh interactive interface. From bash, you would need to call virsh domstats --cpu-total <domain> for specific domain or the simpler, without any specifics – OldFart Apr 2 at 22:03
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Nadya Nux: The command 'domstat --cpu-total' is executed within 'virsh' console, not from bash. So you have basicly two ways to do it.

First:

user@yourserver:~# virsh domstats --cpu-total

Second:

user@yourserver:~# virsh
virsh # domstats --cpu-total

Hope it helps better copy&paste to new readers as well :)

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