RE: Oracle issue with Ultrasparc CPU's
- From: "Kevin Closson" <kevinc@xxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 18 Jul 2006 15:00:11 -0700
>>>
>>>
>>>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.
I don't mean to pick apart your email, but a NUMAQ-2000 with
4 CPUs actually is not NUMA. That is the base building block
which is just a 4 CPU box. The system is not a NUMA until
you stick an OBIC (510 pin Ga ASIC)/SCSLIC card on the
bus.
You did say it was a 4 CPU box, right ?
>>>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.
You are talking about a SCSI channel, right ?
>>>
>>>The devil is in the details that most of us do not have time
>>>or the interest to really get to understand.
You are correct.
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