I havent worked with ESX so I have a doubt, this is the old problem where time runs too fast or slow depending on the Guest OS. Anyone know if with ESX we have same problem too? Thanks -- LSC On Fri, Jan 2, 2009 at 6:41 PM, Allen, Brandon <Brandon.Allen@xxxxxxxxxxx>wrote: > Hi Jon, > > > > Could you please provide more details on the bad performance you've seen > with Oracle on VMWare? I've tested performance with 64-bit Oracle 10.2.0.4 > on OEL 4 & 5 both running on VMWare ESX 3.5 and performance was just as good > on VMWare as it was on bare metal. I've also implemented a production > environment in this configuration and another one running Oracle App Server > 10g on VMWare with excellent performance as well. Maybe you were testing on > an older version of VMWare, or VMWare Server instead of ESX, or had some > misconfiguration or bug that was causing problems? For example, I had > horrible performance when I ran 32-bit OEL4 on 64-bit VMWare, but when I > switched to 64-bit OEL4, performance was great. > > > > Here is a good article about Oracle on VMWare (maybe a wee bit biased given > the source): > > http://blogs.vmware.com/performance/2007/11/ten-reasons-why.html > > > > No, I don't work for VMWare, and I don't have extensive experience with it > – only about 6 months, but so far, so good in my experience. > > > > Regards, > > Brandon > > > > *From:* oracle-l-bounce@xxxxxxxxxxxxx [mailto: > oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *Crisler, Jon > > *Sent:* Wednesday, December 31, 2008 11:18 AM > *Subject:* RE: db_recovery_file_dest_size > > Virtualization is pretty cool and has its place, but it has to be used > wisely. High stress mission-critical environments that I would not hesitate > to put on any other vendors hardware or OS, including RH Linux, IMO should > never be put under VMware…performance is so bad. My findings are that > production databases just don't belong on VMware unless the application is > really small. You really hit the nail dead-on- its got to be low stress > (i.e. light activity). Although performance is my big complaint, > reliability seems to be fine. > > > > ------------------------------ > Privileged/Confidential Information may be contained in this message or > attachments hereto. Please advise immediately if you or your employer do not > consent to Internet email for messages of this kind. Opinions, conclusions > and other information in this message that do not relate to the official > business of this company shall be understood as neither given nor endorsed > by it. >