This is a windows installation postgresql 8.5.1 trying to start postgresql provides the following: 2006-12-03 08:58:11 LOG: database system was shut down at 2006-12-02 11:01:55 Mountain Standard Time 2006-12-03 08:58:11 LOG: checkpoint record is at 13/173572B0 2006-12-03 08:58:11 LOG: redo record is at 13/173572B0; undo record is at 0/0; shutdown TRUE 2006-12-03 08:58:11 LOG: next transaction ID: 2146484148; next OID: 59499 2006-12-03 08:58:11 LOG: next MultiXactId: 11951; next MultiXactOffset: 26281 2006-12-03 08:58:11 LOG: database system is ready 2006-12-03 08:58:11 LOG: transaction ID wrap limit is 2147484148, limited by database "postgres" 2006-12-03 08:58:11 WARNING: database "postgres" must be vacuumed within 1000000 transactions 2006-12-03 08:58:11 HINT: To avoid a database shutdown, execute a full-database VACUUM in "postgres". 2006-12-03 08:58:11 ERROR: database is not accepting commands to avoid wraparound data loss in database "postgres" 2006-12-03 08:58:11 HINT: Stop the postmaster and use a standalone backend to vacuum database "postgres". 2006-12-03 08:59:11 ERROR: database is not accepting commands to avoid wraparound data loss in database "postgres" 2006-12-03 08:59:11 HINT: Stop the postmaster and use a standalone backend to vacuum database "postgres". 2006-12-03 08:59:23 FATAL: database is not accepting commands to avoid wraparound data loss in database "postgres" 2006-12-03 08:59:23 HINT: Stop the postmaster and use a standalone backend to vacuum database "postgres". 2006-12-03 08:59:55 LOG: received fast shutdown request 2006-12-03 08:59:55 LOG: shutting down 2006-12-03 08:59:55 LOG: database system is shut down 2006-12-03 08:59:56 LOG: logger shutting down The database will start up in startAlone mode via the postgres command But at this point I can not connect via psql to issue a vacuum. How do I issue a vacuum while in standalone mode? Thank, Roger