I'm running several production Oracle 10.2.0.4 databases on OEL5.2 and Oracle Application Server 10.1.2.3 on OEL4.7, all 64-bit (except OAS) and all running on a VMWare ESX 3.5 cluster running on Dell 2950s, each with two quad-core CPUs and 32GB RAM. Performance and stability have been great except for one server in the cluster that seems to have a bad fiber adapter or some other problem that gives intermittent high disk service times. We're still troubleshooting to identify the cause and have removed that node from the VMWare cluster in the meantime. We did have some performance problems in the beginning when we tried to run 32-bit OEL4, but it went away when we switched to 64-bit. I've opened several SRs with Oracle on this environment and had no problems getting support for my databases and app servers, and even one SR for Linux, but that's no guarantee of future results. Regards, Brandon -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Hameed, Amir I am interested to know if folks in this DL are running mission critical Oracle software on vmware 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. -- //www.freelists.org/webpage/oracle-l