Re: Opteron vs Xeon (Was: What to do with 6 disks?)

От: Jeff Frost
Тема: Re: Opteron vs Xeon (Was: What to do with 6 disks?)
Дата: ,
Msg-id: Pine.LNX.4.62.0504192315410.21883@discord.dyndns.org
(см: обсуждение, исходный текст)
Ответ на: Re: Opteron vs Xeon (Was: What to do with 6 disks?)  ("J. Andrew Rogers")
Ответы: Re: Opteron vs Xeon (Was: What to do with 6 disks?)  (William Yu)
Список: pgsql-performance

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     What to do with 6 disks?  (Jeff Frost, )
      Re: What to do with 6 disks?  ("Jim C. Nasby", )
      Re: What to do with 6 disks?  (Josh Berkus, )
       Re: Opteron vs Xeon (Was: What to do with 6 disks?)  (Jeff Frost, )
        Re: Opteron vs Xeon (Was: What to do with 6 disks?)  ("J. Andrew Rogers", )
         Re: Opteron vs Xeon (Was: What to do with 6 disks?)  (Jeff Frost, )
          Re: Opteron vs Xeon (Was: What to do with 6 disks?)  (William Yu, )
        Re: Opteron vs Xeon (Was: What to do with 6 disks?)  (Vivek Khera, )
       Re: What to do with 6 disks?  (Vivek Khera, )
      Re: What to do with 6 disks?  (William Yu, )
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 Re: How to improve db performance with $7K?  ("Mohan, Ross", )
 Re: How to improve db performance with $7K?  ("Mohan, Ross", )
 Re: How to improve db performance with $7K?  ("Dave Held", )
 Re: How to improve db performance with $7K?  ("Mohan, Ross", )

On Tue, 19 Apr 2005, J. Andrew Rogers wrote:

> I don't know about 2.5x faster (perhaps on specific types of loads), but the
> reason Opterons rock for database applications is their insanely good memory
> bandwidth and latency that scales much better than the Xeon.  Opterons also
> have a ccNUMA-esque I/O fabric and two dedicated on-die memory channels *per
> processor* -- no shared bus there, closer to real UNIX server iron than a
> glorified PC.

Thanks J!  That's exactly what I was suspecting it might be.  Actually, I
found an anandtech benchmark that shows the Opteron coming in at close to 2.0x
performance:

http://www.anandtech.com/linux/showdoc.aspx?i=2163&p=2

It's an Opteron 150 (2.4ghz) vs. Xeon 3.6ghz from August.  I wonder if the
differences are more pronounced with the newer Opterons.

-Jeff


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