Bump. I'm curious about this one as well. TBH haven't read the instructions yet but I'll be in this same situation at some point (needing to upgrade).
TCRGAR52: was the database upgrade done through the GUI or something? If you ran somekind of file (installer or whatever) from the CLI the output of that script should be sufficient to determine whether or not the upgrade was successful. If the upgrade was done through the GUI you might want to check the management-server.log file or /var/log/mysqld.log.