32bit vs 64bit ?

Digital's brochure about their XAP servers and the 64 bit OpenVMS claim an houndredfold advantage for a database (Rdb & Oracle) that use a 64 bit Very Large Memory model over the same but only 32 bit software.

I understand that you have a much larger address space in 64 bit but how this can be translated in a so big performance advantage?

Thanks in advance for every answer.

[]----------------------------------------[]-----------------[]-------------[]


| Paolo Bertiglia: Scout, Oracle DBA, Mac  | Communism and    |   Official   |

| owner, Eudora fan, rpg and independent   | capitalism are   |   Kibitzer   |

| comics and SF collector, wannabe writer, | two faces of the |     for      |

| designer, more hairy, father, smarter,   | same coin in     | DIGEST GROUP |

| Tremere, ecc. ;).                        | someone else     | PUBLICATIONS |


| From Italy of course.                    | wallet.          |      ;)      |


[]________________________________________[]_________________[]_____________[]