PostgreSQL 8.4 replication of more than 100 tables
The solution was to use Postgres version 9.1 and Oracle Version 11.2.0.1.0. 

I am running oracle in Debian Wheezy all do i need is to do some upgrades in certain libraries and now it works good: 

Version of ODBC:

ii  odbc-postgresql:amd64              1:09.01.0100-1+deb7u1         amd64        ODBC driver for PostgreSQL


Version of Libssl required by ODBC: 

ii  libssl1.0.0:amd64                  1.0.1e-2+deb7u13              amd64        SSL shared libraries 


Postgres version in the another server:

ii  postgresql-9.1                     9.1.15-0+deb7u1               amd64        object-relational SQL database, version 9.1 server


This is how do i install Oracle with PostgreSQL 9.1 datalink and its working very fine now, also with Mysql 5.5. 

Think now i will be able with this new version to do easy replication just like i do in the Mysql instances!