Hi Adrian, Port numbers are correct. I moved the position of -c (-p 5433 -P 5434 -c -r -v). Now it is NOT complaining about old cluster running. However, I am running into a different problem. New cluster database "ifb_prd_last" is not empty Failure, exiting Note: ifb_prd_last is not new cluster. It is actually old cluster. Is this possibly because in one of my earlier attempts where I shutdown old cluster and ran pg_upgrade with -c at the end of the command line. I think -c was ignored and my cluster has been upgraded in that attempt. Is that possible? -----Original Message----- From: Adrian Klaver [mailto:adrian.klaver@xxxxxxxxxxx] Sent: Tuesday, June 12, 2018 4:35 PM To: Murthy Nunna <mnunna@xxxxxxxx>; pgsql-general@xxxxxxxxxxxxxxxxxxxx; pgsql-admin@xxxxxxxxxxxxxxxxxxxx; pgsql-performance@xxxxxxxxxxxxxxxxxxxx Subject: Re: pg_upgrade 10.2 On 06/12/2018 02:18 PM, Murthy Nunna wrote: > pg_upgrade -V > pg_upgrade (PostgreSQL) 10.4 > > pg_upgrade -b /fnal/ups/prd/postgres/v9_3_14_x64/Linux-2-6/bin -B > /fnal/ups/prd/postgres/v10_4_x64/Linux-2-6/bin -d > /data0/pgdata/ifb_prd_last -D /data0/pgdata/ifb_prd_last_104 -p 5433 > -P 5434 -r -v –c > > Looks good to me. The only thing that stands out is that in your original post you had: -p 5432 and above you have: -p 5433 Not sure if that makes a difference. The only suggestion I have at the moment is to move -c from the end of the line to somewhere earlier on the chance that there is a bug that is not finding it when it's at the end. -- Adrian Klaver adrian.klaver@xxxxxxxxxxx