RE: 64-Bit Oracle on Windows 2003
- From: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>
- To: <kevinc@xxxxxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 16 Aug 2006 17:10:41 -0700
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@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin Closson
Sent: Wednesday, August 16, 2006 4:14 PM
To: oracle-l@xxxxxxxxxxxxx
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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