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

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От Jeff Frost
Тема Re: Opteron vs Xeon (Was: What to do with 6 disks?)
Дата
Msg-id Pine.LNX.4.62.0504192134450.21883@discord.dyndns.org
обсуждение исходный текст
Ответ на Re: What to do with 6 disks?  (Josh Berkus)
Ответы 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?)  (Vivek Khera)
Список pgsql-performance
Дерево обсуждения
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 Re: How to improve db performance with $7K?  (Tom Lane, )
  Re: How to improve db performance with $7K?  (Steve Poe, )
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       Re: How to improve db performance with $7K?  (Steve Poe, )
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 Re: How to improve db performance with $7K?  ("Dave Held", )
 Re: How to improve db performance with $7K?  ("Mohan, Ross", )
  Re: How to improve db performance with $7K?  (Steve Poe, )
   Re: How to improve db performance with $7K?  ("Joshua D. Drake", )
   Re: How to improve db performance with $7K?  (William Yu, )
    Re: How to improve db performance with $7K?  (Greg Stark, )
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      Re: How to improve db performance with $7K?  (Greg Stark, )
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           Re: How to improve db performance with $7K?  (Alex Turner, )
        Re: How to improve db performance with $7K?  (Steve Poe, )
         Re: How to improve db performance with $7K?  (Alex Turner, )
     Re: How to improve db performance with $7K?  (Jacques Caron, )
      Re: How to improve db performance with $7K?  ("Jim C. Nasby", )
     Re: How to improve db performance with $7K?  (William Yu, )
 Re: How to improve db performance with $7K?  ("Dave Held", )
 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?  ("Jim C. Nasby", )
 Re: How to improve db performance with $7K?  ("Mohan, Ross", )
  Re: How to improve db performance with $7K?  ("Jim C. Nasby", )
   Re: How to improve db performance with $7K?  (Alex Turner, )
 Re: How to improve db performance with $7K?  ("Dave Held", )
  Re: How to improve db performance with $7K?  (Alex Turner, )
   Re: How to improve db performance with $7K?  (William Yu, )
 Re: How to improve db performance with $7K?  ("Mohan, Ross", )
  Re: How to improve db performance with $7K?  (Bruce Momjian, )
   Re: How to improve db performance with $7K?  (, )
    Re: How to improve db performance with $7K?  ("Jim C. Nasby", )
     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, )
 Re: How to improve db performance with $7K?  ("Mohan, Ross", )
  Re: How to improve db performance with $7K?  (Bruce Momjian, )
  Re: How to improve db performance with $7K?  (Dawid Kuroczko, )
 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?  ("Mohan, Ross", )
 Re: How to improve db performance with $7K?  ("Dave Held", )
 Re: How to improve db performance with $7K?  ("Mohan, Ross", )
> RAID1 2 disks OS, pg_xlog
> RAID 1+0 4 disks pgdata

Looks like the consensus is RAID 1 for OS, pg_xlog and RAID10 for pgdata.  Now
here's another performance related question:

I've seen quite a few folks touting the Opteron as 2.5x faster with postgres
than a Xeon box.  What makes the Opteron so quick?  Is it that Postgres
really prefers to run in 64-bit mode?

When I look at AMD's TPC-C scores where they are showing off the Opteron
http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_8796_8800~96125,00.html
It doesn't appear 2.5x as fast as the Xeon systems, though I have heard from a
few Postgres folks that a dual Opteron is 2.5x as fast as a dual Xeon.  I
would think that AMD would be all over that press if they could show it, so
what am I missing?  Is it a bus speed thing?  Better south bridge on the
boards?

--
Jeff Frost, Owner     <>
Frost Consulting, LLC     http://www.frostconsultingllc.com/
Phone: 650-780-7908    FAX: 650-649-1954

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