For the first issue, use your system monitoring tools to verify what is using the CPU. Is it all Collaborator?
For the second issue, "upgrade your database" refers not to which version of the Oracle server or Oracle JDBC driver you're using but rather to the fact that we have to upgrade (modify) the Collaborator database schema to work with Collaborator 13.6. The upgrade error *might* be a temporary problem in the internal DB upgrade process. Try restarting Collaborator. If that doesn't work, then the problem may be that you need the CTX_DDL package installed on the Oracle server. See this article:
https://support.smartbear.com/collaborator/docs/server/install/db/oracle.html
If that doesn't help, open a support case.
