Toad DB Heath Check window hangs and consumes almost 50% of CPU when clicked Params link for
Play a custom script at the end of the Health Check in DB Heath Check | Settings Tab.
Toad for Oracle hangs and the application needs to be killed.
Confirm if a large amount of databases are being loading from the TNSNAMES.ORA file.
If confirmed, reduce the TNSNAMES.ORA files to only the databases that are needed.
Waiting for fix in a future version of Toad for Oracle.