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Re: [Xen-users] High Oracle overhead with Xen 4.1.2

On Tue, Mar 20, 2012 at 11:54 AM, AP <apxeng@xxxxxxxxx> wrote:
>>>> It was 2.6.18-238.el5. Should I be running with el5xen?
>>> Do you know the difference between PV and HVM?
>> Ah yes. I will fix that. Thanks for pointing that out.
> Thinking about it... PV on HVM drivers only help when IO is involved.
> It is not going to help with VMX CPU overhead and most of the
> benchmark is being run in memory. But I will give it a shot anyhow...

Correct. Which is why I didn't suggest installing PV drivers.

You need to use PV domU instead, which doesn't have the CPU overhead
of having to rely on hardware-assisted virtualization.


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