RE: Oracle Performance on VMWare

From: Allen, Brandon <>
Date: Fri, 2 Jan 2009 10:41:41 -0700
Message-ID: <64BAF54438380142A0BF94A23224A31E10A32F17AE_at_ONEWS06.oneneck.corp>

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 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):

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.


From: [] 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.

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Received on Fri Jan 02 2009 - 11:41:41 CST

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