During the upgrade process, the installer will update the repository objects and an error may pop up saying:
The transaction log for database 'Quest_Perf_Analysis' is full...Note: prior to getting this error, the installer may remain on the 'upgrading repository objects' screen for 10 to 20 min.
To resolve the'Quest_Perf_Analysis' is fullerror.
Change the Maximum file size of the Quest_Perf_Analysis_Log from 1GB to unrestricted.
Once this is done, re-run the installer and the repository update will finish successfully.