Just to clarify… the commercial version of PBS Pro comes packaged with PostgreSQL, where the open source version lists PostgreSQL as a prerequisite. When PostgreSQL is installed independently of PBS Pro it creates a user named postgres, and the open source release uses that user ID for the PBS Pro database. I’ve seen cases where the ownership of the PBS Pro database directory has been inadvertently changed. This can be fixed with the following command:
chown -R postgres:postgres /var/spool/pbs/datastore