RE: Oracle issue with Ultrasparc CPU's
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 18 Jul 2006 16:53:55 -0400
NUMA as in Sequent NUMA (non-uniform memory architecture, or maybe it is
access). There is more to server performance that just the CPU speed.
Our old machine had a very fast buss however the vendor put everything
across that one buss. Everyting being both memory access and IO.
Having a separate IO buss and memory buss means two slower speed
dedicated busses may well outperm a higher speed but over-burdened buss.
A reduction in disk platters may not have the negative effect on IO that
you might expect when you consider that it was not possible to write to
all the disks at once. The disks were more or less daisy chained
together so that you could only write to one disk in a chain at a time.
Hence the reduction in the absolute difference in number of platters has
much less of a negative effect than you might expect. Then throw cache
in front of the new disk, plus the new disk probably ran at a higher RPM
and you get more IO's per second from less disk platters.
The devil is in the details that most of us do not have time or the
interest to really get to understand. Besides just like Oracle they
change.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]
Sent: Tuesday, July 18, 2006 4:13 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: RE: Oracle issue with Ultrasparc CPU's
>>>
>>>
>>>Interesting. A 10x improvement. It seems reducing your physical
>>>platters by 90% would get you that. Could it me
oops...I meant wouldn't...Could it be
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