Re: pg_upgrade difficulties

Steve Crawford <scrawford@pinpointresearch.com> writes:
> waiting for server to start....../usr/pgsql-9.1/bin/pg_ctl: symbol
> lookup error: /usr/pgsql-9.1/bin/pg_ctl: undefined symbol: PQping

> There were problems executing "/usr/pgsql-9.1/bin/pg_ctl" -w -l
> "upgrade.log" -D "/var/lib/pgsql/9.1/data" -o "-p 5432 -b" start >>
> "upgrade.log" 2>&1

This looks like your pg_ctl executable is mistakenly getting linked to a
pre-9.1 version of libpq.so.  Don't know enough about the file layout in
the current PGDG RPMs to speculate as to why.

            regards, tom lane