Hi, i was too fast in reply (and perhaps i should drink my morning coffee before replying), I will try to be more detailed: both servers should be able to run at the moment you run pg_upgrade, that means the 2 servers should have been correctly stopped in advance, should have their configuration files, and new cluster initialized too. Then, as Sergei highlights here below, pg_upgrade will take care of the upgrade process, starting the servers. Here there is a step by step guide, i considered my best ally when it was time to upgrade: https://www.postgresql.org/docs/9.4/static/pgupgrade.html note point 7: 'stop both servers' About the port the servers will run on, at point 9 there is some clarification: ' pg_upgrade defaults to running servers on port 50432 to avoid unintended client connections. You can use the same port number for both clusters when doing an upgrade because the old and new clusters will not be running at the same time. However, when checking an old running server, the old and new port numbers must be different.' Hope it helps, Fabio Pardi On 04/18/2018 10:34 AM, Akshay Ballarpure wrote: > Thanks Fabio for instant reply. > > I now started 8.4 with 50432 and 9.4 with default port but still its > failing ...Can you please suggest what is wrong ? > > -bash-4.2$ /opt/rh/rh-postgresql94/root/usr/bin/pg_upgrade > --old-bindir=/usr/bin --new-bindir=/opt/rh/rh-postgresql94/root/usr/bin > --old-datadir=$OLDCLUSTER --new-datadir=$NEWCLUSTER > > *failure* > Consult the last few lines of "pg_upgrade_server.log" for > the probable cause of the failure. > > There seems to be a postmaster servicing the old cluster. > Please shutdown that postmaster and try again. > Failure, exiting > -bash-4.2$ ps -eaf | grep postgres > root 8646 9365 0 08:07 pts/1 00:00:00 su - postgres > postgres 8647 8646 0 08:07 pts/1 00:00:00 -bash > postgres 9778 1 0 09:17 ? 00:00:00 /usr/bin/postgres -p > 50432 -D /var/ericsson/esm-data/postgresql-data/ > postgres 9779 9778 0 09:17 ? 00:00:00 postgres: logger process > postgres 9781 9778 0 09:17 ? 00:00:00 postgres: writer process > postgres 9782 9778 0 09:17 ? 00:00:00 postgres: wal writer > process > postgres 9783 9778 0 09:17 ? 00:00:00 postgres: autovacuum > launcher process > postgres 9784 9778 0 09:17 ? 00:00:00 postgres: stats > collector process > postgres 9900 1 0 09:20 ? 00:00:00 > /opt/rh/rh-postgresql94/root/usr/bin/postgres -D > /var/ericsson/esm-data/postgresql-data-9.4/ > postgres 9901 9900 0 09:20 ? 00:00:00 postgres: logger process > postgres 9903 9900 0 09:20 ? 00:00:00 postgres: checkpointer > process > postgres 9904 9900 0 09:20 ? 00:00:00 postgres: writer process > postgres 9905 9900 0 09:20 ? 00:00:00 postgres: wal writer > process > postgres 9906 9900 0 09:20 ? 00:00:00 postgres: autovacuum > launcher process > postgres 9907 9900 0 09:20 ? 00:00:00 postgres: stats > collector process > postgres 9926 8647 0 09:21 pts/1 00:00:00 ps -eaf > postgres 9927 8647 0 09:21 pts/1 00:00:00 grep --color=auto postgres > > > -bash-4.2$ netstat -antp | grep 50432 > (Not all processes could be identified, non-owned process info > will not be shown, you would have to be root to see it all.) > tcp 0 0 127.0.0.1:50432 0.0.0.0:* > LISTEN 9778/postgres > tcp6 0 0 ::1:50432 :::* > LISTEN 9778/postgres > -bash-4.2$ netstat -antp | grep 5432 > (Not all processes could be identified, non-owned process info > will not be shown, you would have to be root to see it all.) > tcp 0 0 127.0.0.1:5432 0.0.0.0:* > LISTEN 9900/postgres > tcp6 0 0 ::1:5432 :::* > LISTEN 9900/postgres > > ----------------------------------------------------------------- > pg_upgrade run on Wed Apr 18 09:24:47 2018 > ----------------------------------------------------------------- > > command: "/usr/bin/pg_ctl" -w -l "pg_upgrade_server.log" -D > "/var/ericsson/esm-data/postgresql-data" -o "-p 50432 -c autovacuum=off > -c autovacuum_freeze_max_age=2000000000 -c listen_addresses='' -c > unix_socket_permissions=0700" start >> "pg_upgrade_server.log" 2>&1 > pg_ctl: another server might be running; trying to start server anyway > FATAL: lock file "postmaster.pid" already exists > HINT: Is another postmaster (PID 9778) running in data directory > "/var/ericsson/esm-data/postgresql-data"? > pg_ctl: could not start server > Examine the log output. > > > [root@ms-esmon /]# cat > ./var/ericsson/esm-data/postgresql-data-9.4/postmaster.pid > 9900 > /var/ericsson/esm-data/postgresql-data-9.4 > 1524039630 > 5432 > /var/run/postgresql > localhost > 5432001 2031616 > > > [root@ms-esmon /]# cat > ./var/ericsson/esm-data/postgresql-data/postmaster.pid > 9778 > /var/ericsson/esm-data/postgresql-data > 50432001 1998850 > > > > > With Best Regards > Akshay > > > > > > From: Fabio Pardi <f.pardi@xxxxxxxxxxxx> > To: Akshay Ballarpure <akshay.ballarpure@xxxxxxx>, > pgsql-general@xxxxxxxxxxxxxxxxxxxx > Date: 04/18/2018 01:06 PM > Subject: Re: pg_upgrade help > ------------------------------------------------------------------------ > > > > Hi, > > please avoid crossposting to multiple mailing lists. > > > You need to run both versions of the database, the old and the new. > > They need to run on different ports (note that it is impossible to run 2 > different processes on the same port, that's not a postgresql thing) > > > > On 04/18/2018 09:30 AM, Akshay Ballarpure wrote: >> Hi all, >> I need help on pg_upgrade from 8.4 to 9.4 version. Appreciate urgent >> response. >> Installed both version and stopped it. Do i need to run both version or >> only one 8.4 or 9.4 . Both should run on 50432 ? >> >> >> -bash-4.2$ id >> uid=26(postgres) gid=26(postgres) groups=26(postgres) >> context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 >> >> -bash-4.2$ export OLDCLUSTER=/var/ericsson/esm-data/postgresql-data >> -- 8.4 data >> -bash-4.2$ export NEWCLUSTER=/var/ericsson/esm-data/postgresql-data-9.4 >> -- 9.4 data >> >> >> -bash-4.2$ /opt/rh/rh-postgresql94/root/usr/bin/pg_upgrade >> --old-bindir=/usr/bin --new-bindir=/opt/rh/rh-postgresql94/root/usr/bin >> --old-datadir=$OLDCLUSTER --new-datadir=$NEWCLUSTER >> >> *connection to database failed: could not connect to server: No such >> file or directory* >> Is the server running locally and accepting >> connections on Unix domain socket >> "/var/run/postgresql/.s.PGSQL.50432"? >> >> >> could not connect to old postmaster started with the command: >> "/usr/bin/pg_ctl" -w -l "pg_upgrade_server.log" -D >> "/var/ericsson/esm-data/postgresql-data" -o "-p 50432 -c autovacuum=off >> -c autovacuum_freeze_max_age=2000000000 -c listen_addresses='' -c >> unix_socket_permissions=0700" start >> Failure, exiting >> >> >> >> >> With Best Regards >> Akshay >> >> =====-----=====-----===== >> Notice: The information contained in this e-mail >> message and/or attachments to it may contain >> confidential or privileged information. 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