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

On Mon, Mar 19, 2012 at 9:51 PM, AP <apxeng@xxxxxxxxx> wrote:
> On Mon, Mar 19, 2012 at 9:49 PM, Fajar A. Nugraha <list@xxxxxxxxx> wrote:
>> On Tue, Mar 20, 2012 at 1:38 AM, AP <apxeng@xxxxxxxxx> wrote:
>>> On Sat, Mar 17, 2012 at 4:51 PM, Florian Heigl <florian.heigl@xxxxxxxxx> 
>>> wrote:
>>>> Hi,
>>>> questions:
>>>> Guest OS: CentOS 5.6 (Linux 2.6.18-238.el5) with 12 GB memory and 4 vcpus
>>>> Is it  2.6.18-238.el5 or  2.6.18-238.el5xen?
>>> 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...

>> If you use 2.6.18-238.el5, most likely you're using HVM domU. Don't be
>> surprised if it's much slower.
>> --
>> Fajar

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