Windchill ESI - TIBCO - ORACLE

Hello,

I am doing an R&D on the Windchill ESI - TIBCO - ORACLE COnfigurations and Mapping. I found this article below:
https://support.ptc.com/help/windchill/r12.1.2.0/en/index.html#page/Windchill_Help_Center/esi_install/ESIORACLEInstallConfig.html#

Mapping and configuration are precise, but I am not sure about the hardware Sizings, like

1. what OS is needed for Windchill ESI and TIBCO

2. What Java Version is required for Windchill ESI and TIBCO

Thanks,