Yes it is around 5 GB; you have to have high speed uninterrupted connection. Otherwise you end up with couple of hours in waiting to complete the download.
4) Unzip the RCU zip file into some directory and run the rcu.bat under BIN directory. Make sure your database is up before running the RCU; this will install the BI and Metadata schema.
Select Create option and click next…
Provide the Database connection details. Use the user, which has SYSDBA privilege. Better use the sys or system user to avoid any confusion. This user will be used to create the schema.
It will check the Prerequisite,
On Next step, specify the location, where you want to install the software. Make sure it has around 11gb free disk space.