Josh Berkus wrote:
> Tom,
> > So in the short term I think we have to tell people that Xeon MP is not
> > the most desirable SMP platform to run Postgres on.  (Josh thinks that
> > the specific motherboard chipset being used in these machines might
> > share some of the blame too.  I don't have any evidence for or against
> > that idea, but it's certainly possible.)
> I have 3 reasons for thinking this:
> 1) the ServerWorks chipset is present in the fully documented cases that we 
> have of this problem so far.   This is notable becuase the SW is notorious 
> for poor manufacturing quality, so much so that the company that made them is 
> currently in receivership.   These chips were so bad that Dell was forced to 
> recall several hundred of it's 2650's, where the motherboards caught fire!
> 2) the main defect of the SW is the NorthBridge, which could conceivably 
> adversely affect traffic between RAM and the processor cache.
> 3) XeonMP is a very popular platform thanks to Dell, and we are not seeing 
> more problem reports than we are.
> The other thing I'd like your comment on, Tom, is that Dirk appears to have 
> reported that when he installed a non-bigmem kernel, the issue went away.   

I have BSD on a SuperMicro dual Xeon, so if folks want another
hardware/OS combination to test, I can give out logins to my machine.

  Bruce Momjian                        |
  [EMAIL PROTECTED]               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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