Re: Test mail for pgsql-admin

Thanks, now 3 versions, 14, 15, and 16 are running as shown below.  I did pg_upgrade as detailed below, but it asked me to shutdown postmaster, should which postmaster be down and how?

##three

#sudo pg_lsclusters

 Ver Cluster Port Status Owner    Data directory              Log file
14  main    5432 online postgres /var/lib/postgresql/14/main /var/log/postgresql/postgresql-14-main.log
15  main    5434 online postgres /var/lib/postgresql/15/main /var/log/postgresql/postgresql-15-main.log
16  main    5433 online postgres /var/lib/postgresql/16/main /var/log/postgresql/postgresql-16-main.log

##pg_upgrade

/usr/lib/postgresql/16/bin/pg_upgrade -b /usr/lib/postgresql/15/bin -B /usr/lib/postgresql/16/bin -d /var/lib/postgresql/15/main -D /var/lib/postgresql/16/main --check