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Home -> Community -> Usenet -> c.d.o.server -> Re: Oracle RAC vs VM WARE
On 13 mai, 23:14, Valentin Minzatu <valentinminz..._at_yahoo.com> wrote:
> On May 11, 11:11 pm, EscVector <J..._at_webthere.com> wrote:
> > I have no problems running multiple instances or vm on the same
> > machines. In fact, some vm images run faster than native. It all
> > depends on how you set it up.
>
> > If you have to ask, then stay away from RAC
>
> EscVector, I am arguing on the fact that VMs can be tuned to run
> faster than the native O/S although I would have to see it (not
> intention to flame anybody here).
>
> I doubt though that 3 VMs, each with an Oracle instance running
> inside, will perform better than single Oracle instance on the same
> hardware.
>
We have so far three customer running Oracle in a W2003 vm under WMWare ESQ on Sun/SAN...
We observed that the VM is twice slower than the physical machine (despite CPU guarantee)
I realize that this is anecdotical data. However, the undisputable fact is that so far the customers using Oracle under VMWare on production systems call us a lot for performance problems :-)
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