The pg_dump and pg_restore look to be the same version on both boxes ( 9.1.8 ).
The pg_dump looks like this:pg_dump \
--host=myhost \
--port=5432 \
--username=myusername \
--format=c \
--file=backup_file.dump \
mydb
Additional notes:
The pg_dump is running on a box with CentOS 6.4 / PostgreSQL 9.1.8
The pg_restore is then executed on a box with CentOS 5.9 / PostgreSQL 9.1.8
The .dump file is 41 GB
A $yum list | grep libpq yields nothing on the CentOS 6.4 box but gives this on 5.9
$ yum list | grep libpq
libpqxx.i386 2.6.8-13.el5 epel
libpqxx.x86_64 2.6.8-13.el5 epel
libpqxx-devel.i386 2.6.8-13.el5 epel
libpqxx-devel.x86_64 2.6.8-13.el5 epel
We have not tried without the -j but will give it a go.
Please let me know if there are any additional thoughts giving the new info above.