32 bit version is 32 bit (databases limited to about 2GB per process, as are memory mappings). If that's good for you, use it. The 64-bit was, last I inquired

32 bit version is 32 bit (databases limited to about 2GB per process, as are memory mappings). If that's good for you, use it. The 64-bit was, last I inquired (8 years ago or so) was in the "if you have to ask you can't afford it" oracle territory.