I wish to run an instance of PG-9.2 concurrently with our production version (9.1). I have changed the listening port number. listen_addresses = 'pgsql-dbms.hamilton.harte-lyne.ca, localhost' #port = 5432 # (change requires restart) port = 5433 However, I am getting this error when I try to start the new version while the old one is still running. Is there something else I must do to accomplish this? Why is the lock file using the default port number for this instance? cat ../pgstartup.log 2012-12-14 09:13:41 EST : LOG: XX000: could not bind IPv4 socket: Address already in use 2012-12-14 09:13:41 EST : HINT: Is another postmaster already running on port 5432? If not, wait a few seconds and retry. 2012-12-14 09:13:41 EST : LOCATION: StreamServerPort, pqcomm.c:438 2012-12-14 09:13:41 EST : WARNING: 01000: could not create listen socket for "pgsql-dbms.hamilton.harte-lyne.ca" 2012-12-14 09:13:41 EST : LOCATION: PostmasterMain, postmaster.c:892 2012-12-14 09:13:41 EST : FATAL: F0001: lock file "/tmp/.s.PGSQL.5432.lock" already exists 2012-12-14 09:13:41 EST : HINT: Is another postmaster (PID 1299) using socket file "/tmp/.s.PGSQL.5432"? 2012-12-14 09:13:41 EST : LOCATION: CreateLockFile, miscinit.c:822 -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@xxxxxxxxxxxxx Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3 -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general