CENTOS 4.7 or 5.2 32 bits O.S. for ORACLE DB server??

[mcclnx mcc <mcclnx@xxxxxxxxxxxx>]

we plan to setup our ORACLE database server (32 bits DB) and use dell r900 server.  This server can put up to 128GB RAM.
We are thinking use 32 bits CENTOS 4.7 or 5.2.  My concern about CENTOS 5.2 is it only support up to 16 GB RAM on 32 bits O.S.
Any suggestion?

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