Oracle and Postgresql Play Nice Together on Same Computer?

Hello,

I am an Oracle DBA and I want do a Postgresql 'proof of concept' at the
large corporation where I work to test the benefits of using Postgresql in
our environment. I want to install Postgresql onto a "production" server
that currently runs Oracle. Are there any problems with running Postgresql
and Oracle on the same machine? I mean, I've heard that the way Sybase and
DB2 UDB are architected to handle memory hurts Sybase when DB2 UDB is
installed on the same machine as the Sybase Server (something about UDB
eating up all the memory and not giving it back to Sybase).

Are there any issues running Postgresql and Oracle on the same
machine.anything special to know about memory, disk layout, and things like
that? I just want to make sure the two engines play together on this same
server. I had a hard time finding information about this via google.

Thank you for your time!

~ Troyston ~