So, can I derive cpu, memory, disk and network stats of the VMs ? On Monday, December 26, 2022, Marko Horn <weber@zbfmail.de> wrote:
Hello,
yes I can :-)
on the page you will find a link to his 'Linux Performance' book. On the page are also further Infos about the topic 'performance'. you will have to dive into the stuff. (e)BPF is a "MIGHTY" area. But you can pull out nearly 'every' meta data from the kernel.
Also for your interest:
https://www.brendangregg.com/Slides/SREcon2022_ComputingPerformance/
Computing Performance 2022 and what is on the horizon!
have fun!
Slainte
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26.12.2022 18:09:39 Gk Gk <ygk.kmr@gmail.com>:
Thanks Marco for the response. Is it possible to collect these vm stats from the host KVM hypervisor ? Also can u give the link for this book ?
Thanks Happy holidays
On Monday, December 26, 2022, Marko Horn <weber@zbfmail.de> wrote:
Hi,
I think best way is to use BPF to collect stats. I did this in past in combination with 'perf'. Theres a nice book of Brandon Greg from Netflix Networks where he describe how to do this and how to write own scripts.
merry Xmas
marko
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26.12.2022 11:34:20 Gk Gk <ygk.kmr@gmail.com>:
Hi All, I am trying to collect memory, disk and network stats for a VM on kvm host. It seems that the statistics are not matching what the OS inside the VM is reporting. Why is this discrepancy ? Is this a known bug of libvirt ? Also I heard that libvirt shows cumulative figures for these measures ever since the VM was created. Also I tested by creating a new vm and comparing the stats without a reboot . Even in this case, the stats dont agree. Can someone help me here please ?
Thanks Kumar