Object Repository Maximum size should be store in Object repository.
I believe this is only limited to the Disk Space you have available and the patience you have to load all that crap into Memory.
Rule of Thumb, no more than 10 MB If so break them up into release of the application. (This is my Rule & Thumb)
Alfredo R. Rivera
IT Principal SDLC Automation Subject Matter Expert
Certified Mercury Interactive Instructor
Certified Tester, Foundation Level (CTFL)