RHEL 5.6 kvm guest - Proxmox shows wrong stats

Chow

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Apr 28, 2008
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For a customer I installed RHEL 5.6 as guest on kvm. When in proxmox I check the guests all CentOS guests show the correct RAM usage. However on the RHEL guest the free RAM is shown as used RAM. CPU utilization seems to be a bit off also showing higher usage than in fact is used.
Is there an easy explanation for this?? :)
 

dietmar

Proxmox Staff Member
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Apr 28, 2005
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However on the RHEL guest the free RAM is shown as used RAM.
Int the guest, on the host, or what do you compare exactly?

CPU utilization seems to be a bit off also showing higher usage than in fact is used.
Is there an easy explanation for this?? :)
Again, what do you compare? PVE web interface shows stats from the host, including CPU time used by kvm itself (vnc, io, ...), so this is likely to be higher than what you see in the guest.
 

Chow

Member
Apr 28, 2008
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6
Inside the guest

total used free shared buffers cached
4051004 1231780 2819224 0 83516 977340

On proxmox interface for this same guest

 

dietmar

Proxmox Staff Member
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Apr 28, 2005
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As soon as the VM access a memory region it gets marked dirty on the host. Not sure, but maybe KSM will help in your case.
 

Chow

Member
Apr 28, 2008
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KSM is used when you run out of resources. That's not the case here. The host has 32 GB RAM and currently 13 GB is used by the vps-es. In total 18 GB was assigned.
 

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