I am refering the link General Upgrade Process for upgrading my instacne, in this document nothing has mentioned about what you have to do with the database at each instance.
At points 4 and 5, they have not mentioned anything about the database. Should the old database be droped after taking backup and new one created, or u should retain the DB as itselfIf u retain the DB as it is, you can see lots of error in catalina.out once the service is started.
I think the DB should be backed up and droped, then created start the newly installed alfresco instance. then after restoring alf_data , restore the DB back to the orginal and start the service.
This part is not there in the wiki.
Correct me if I am wrong