RE: Oracle issue with Ultrasparc CPU's

From: Kevin Closson <kevinc_at_polyserve.com>
Date: Tue, 18 Jul 2006 15:00:11 -0700
Message-ID: <5D2570CAFC98974F9B6A759D1C74BAD0E5AACC@ex2.ms.polyserve.com>

>>>

>>>
>>>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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Received on Tue Jul 18 2006 - 17:00:11 CDT