Re: Oracle RAC vs VM WARE

On 14 mai, 08:46, hasta..._at_hotmail.com wrote:
> 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 orvmon the same
> > > machines. In fact, somevmimages run faster than native. It all
> > > depends on how you set it up.
>
> > > If you have to ask, then stay away fromRAC
>
> > 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 Oraclei nstance running
> > inside, will perform better than single Oracle instance on the same
> > hardware.
>
> We have so far three customer runningOraclein a W2003vm
> under WMWare ESQ on Sun/SAN...

VMWare ESX... Not yet awaked :-)

>
> 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 usingOracleunder VMWare
> on production systems call us a lot for performance problems :-)
>
> --- Raoul
Received on Mon May 14 2007 - 02:00:25 CDT