RE: 32bit vs 64 bit Linux for Oracle (was: Hardware recommendations for RedHat X86-64/10gR2)

We are running a cluster here of Linux 64 servers for the testing
environment we have multiple instances running on nodes and don't need
any funny switches etc to run instances to consume 16G.

Why 64 just to move away from any bottlenecks that can occur in the
32bit space.

Commercial *nixes have generally supported 64 bit for quite some time,
this isn't a new invention for them, whats different is that they don't
provide any hardware to allow you to run the latest in 32 bit so its not
an either or option anymore, you just get 64 bit hardware and a 64 bit
OS

Cheers  

Peter

-----Original Message-----
From: Ray Feighery [mailto:rjfeighery@xxxxxxxxx] 
Sent: Wednesday, 13 June 2007 11:03 AM
To: oracle-l
Subject: 32bit vs 64 bit Linux for Oracle (was: Hardware recommendations
for RedHat X86-64/10gR2)

Following on from this discussion, what is the take up on Linux 64 bit
vs 32 bit for Oracle? The main reason for going with 64 bit seems to be
for a large SGA, particularly the non buffer cache sections.
Although large is relative; a 2Gb SGA is not considered large any more.

The reasons for staying with 32 bit seems to be perceived driver
immaturity with the 64 bit versions leading to some reports of slower
disk i/o.

I believe the latest versions of the proprietary *nixes (e.g. Solaris,
HP) are now 64 bit.

Basically, if you are building a Linux server to run Oracle would you go
with 64 or 32 bit and why?

Ray
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