[kernel] HD vs CPU performance and rescources

[jmjosebest]

Hello,

I have always noticed that when you compress a file or making vzdump do a negative impact on overall system performance, making bottleneck between the CPU and hard drive. This is so the server is down with 75% -90% io wait.

For some time I am using RHEL virtual machines and this problem still existed, until he had this kernel update:
http://wiki.openvz.org/Download/kernel/rhel5/028stab069.6

The problem has been solved!
when I do a vzdump CPU consumption is 25-30% io wait.

We have some information to do the same in Proxmox?

Thanks!!

 

[dietmar]

There are serious problem with KVM on newer 2.6.18 openvz kernels - we will release a new one as soon as those problems gets solved.

 

[bohansen]

Also this one? It seems just to be a bug fix release on top of the 2.6.18-194.3.1 kernel.