Running both CentosOS 5.x and RHEL 5.x with all te latest patches gives
a rather high CPU-load on the KVM-host, even when the machine is doing
nothing. On the virtual server CPU-load is almost 0%.
Installingen ktune and chaning the I/O scheduler to cfq gives a small
change, CPU-load drops from apr. 26% to 19%. Adding devider=10 to the
kernel parameters gives no improvement. Both nic and disk use virtio.
It seems to be a kernel problem (there numerous thing to find on the
internet) but anyone knows a solution?
Winfried
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