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RE: 64-Bit Oracle on Windows 2003

From: Allen, Brandon <Brandon.Allen_at_OneNeck.com>
Date: Wed, 16 Aug 2006 17:10:41 -0700
Message-ID: <04DDF147ED3A0D42B48A48A18D574C45059E1CEE@NT15.oneneck.corp>


I've never actually experienced it - just speaking based on some reading and my basic understanding of the hardware. My main point wasn't that 64-bit was slower than 32-bit, just that a migration from 32-bit to 64-bit alone shouldn't be expected to boost performance. Here is at least some minimal info to back me up from Metalink 107201.1:

 "32-bit databases run on systems with a small number of 32-bit CPUs (4-6) may
see some degradation in performance if moved to 64-bit systems also with a
small number of 64-bit CPUs.

Applications will achieve the benefits of improved scalability on 64-bit

machine only if they are memory intensive. 64-bit applications have bigger data
structures because memory has to be addressed with a larger number of bits.
Larger data structures translate into addtional memory requirements per process."

And here are a few more links:

http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:15120 05480694

http://www.osnews.com/story.php?news_id=5768

http://news.com.com/5208-1006-0.html?forumID=1&threadID=14587&messageID= 122627&start=-1

http://en.wikipedia.org/wiki/64-bit#32_vs_64_bit

If someone else has some info to prove me wrong, please share it.

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Kevin Closson Sent: Wednesday, August 16, 2006 4:14 PM To: oracle-l_at_freelists.org
Subject: RE: 64-Bit Oracle on Windows 2003                   

>> Hi Donald, I haven't been following this thread so please
forgive me if I'm repeating something that's already been said, but you should be aware that migrating from 32-bit to 64-bit alone (all other variables remaining the same) can be expected to actually degrade

performance slightly. 
                              ^^^^^^^^^^^^^^^^^^^^^^^^^

...can you tell us why? I have seen only extremely odd scenarios where this is true, and it generally isn't the Oracle Server.

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Received on Wed Aug 16 2006 - 19:10:41 CDT

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