Here is some information regarding the hardware requirements for Oracle BI Applications.
10-12 GB of free memory and 10 GB Swap Space for run-time requirements.
35 GB free disk space and 10 GB Swap Space to run the Business Analytics Applications Suite installer. This disk space will be released after the installer finishes.
For additional information about hardware requirements for Oracle BI Enterprise Edition (Oracle BI EE) and Oracle Data Integrator (ODI), see Oracle Fusion Middleware Supported System Configurations on Oracle Technology Network.