RE: 64 bit vs 32 bit Oracle

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Where does this additional throughput come from?

S-

On Fri, 14 Sep 2001, Christopher Spence wrote:

> !! Please do not post Off Topic to this List !!
>
> Depends, 64bit can certainly give you more throughput, but it is very slow
> for being patched.
>
> "Do not criticize someone until you walked a mile in their shoes, that way
> when you criticize them, you are a mile a way and have their shoes."
>
> Christopher R. Spence
> Oracle DBA
> Phone: (978) 322-5744
> Fax: (707) 885-2275
>
> Fuelspot
> 73 Princeton Street
> North, Chelmsford 01863

> -----Original Message-----
> Sent: Friday, September 14, 2001 3:50 PM
> To: Multiple recipients of list ORACLE-L
>
> !! Please do not post Off Topic to this List !!
>
> Is there any benefit of 64 bit versions over 32 bit versions of Oracle
> beyond allowing > 2GB SGAs? (8.1.7/Solaris 2.8 in particular) The
> systems I'm working with are predominantly DSS queries against data sets
> that most of the servers have no hope of caching anywhere near the amount
> of data needed so huge SGAs are not that useful. Our C++ guys tell me
> that Sun reccommends that compiling 64 bit binaries for processes that
> might take advantage of the larger memory limit. The logic being that 64
> bit pointers take up twice as much space as 32 bit pointers and the
> processor cache density is thus lower for 64 bit processes.
>
> Does anyone know if there is any additional trickery Oracle does on the
> 64-bit port that may provide performance benefits that would outweigh the
> potential for lower cache hit rates? Magic data structures?
> _make_sql_faster support?
>
> S-
>

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