...
> Upon issuing the insert statement I receive the following error message:
>
> "could not send data to server: No buffer space available
> (0x00002747/10055)"
>
> I suspect that this happens because we are inserting a lot of data: the
> first BYTEA column is about 1.8MB, while the second is about 0.5MB.
> However...
>
> - The same operation completes without problems when running on other
> machines (which are all running Windows XP and the same Postgres version).
...
are the various tuning parameters in $PGDATA/postgresql.conf set the
same on these various systems ?