From: Holger.VanKoll@SWISSCOM.COM
Date: Wed Sep 18 2002 - 05:51:23 EDT
64bit os means data and addressspace uses 64bit
4.3.3 uses 32bit data structures -> not completely 64bit
if you call /etc/methods/cfg64 at boottime, 64bit apps will run and can
use more than 4gb of memory
if not, every process can only use 4gb, but f.e. 2 processes can use 8gb
(only 90% sure here)
> -----Original Message-----
> From: William Liu [mailto:borgliu@mail2000.com.tw]
> Sent: Wednesday, September 18, 2002 9:03 AM
> To: aix-l@Princeton.EDU
> Subject: p660=64bit cpu?and aix 4.3.3= 32bit?
>
>
> deal all:
>
> in IBM web, It say p660 using RS64 IV 64 bit cpu
> but I rememver aix 4.3.3 is 32bit OS, right?
>
> as 32bit os, the memory address limit is 4GB,
> but p660(and many other server) can install more than 4GB memory.
>
> How can 32bit OS can handle more than 4GB memory?
>
> because if it can't handle, install more than 4GB is meanless, right?
>
> Is any paper or technical information talking about this?
>
> because customer asking me why need more than 4GB memory in
> aix 4.3.3 (in win2k and intel base server are similar...)
>
> thanks.
>
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