This is not an issue of running as the root system user but an issue of the MySQL user not having the required privileges. The MySQL user used to run pt-table-sync needs pretty much all privs because it reads and writes (updates) data.
What privs does the MySQL user you're using have?
This is not an issue of running as the root system user but an issue of the MySQL user not having the required privileges. The MySQL user used to run pt-table-sync needs pretty much all privs because it reads and writes (updates) data.
What privs does the MySQL user you're using have?