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On 09/30/2014 01:50 AM, Howard Leadmon wrote:
Has anyone run into this, or have any idea, or know of any tunable changes I can make that would make the VM play nice with the newer recommended kernel? I was actually stunned changing kernels made the diff between getting hundreds of megs of throughput on the host, to getting a meg or two if lucky, with constant pauses. At the same time, my other CentOS and FBSD VM's seem to run fine, but then again CentOS sticks with an older kernel it seems.
There is an open bug regarding the hypervisor low performance in 14.04. This is probably a kernel issue and they had a patch for it as far as I can remember hat tested the issue.
You can try to contact the mailing list of ubuntu servers and lookup the bug at the bugzilla.
Eliezer