Slower MySQL inserts for AMD64/Opteron?

[Steven Hartland]

Too many variables there too draw any conclusions from the comparison.
Compare like for like.

    Steve / K
----- Original Message ----- 
From: <ray at redshift.com>


>I did some benchmarks recently on a single 2.4Ghz Xeon against a Dual 246
> Opteron and noticed when it came to MySQL inserts, the single Xeon was about 20%
> faster on inserts (and it actually had a slower hard drive, IDE vs SATA).  The
> interesting thing is that the Dual Opterons was twice as fast retrieving the
> data using selects.
> 
> Does anyone have any ideas as to why the single Xeon would beat it on inserts?
> I've seen other benchmarks floating around (e.g. Tom's hardware guide) that
> seems to mirror the results I found.  I also spoke to AMD about it and they only
> suggestion was to try running i386 on the AMD, as opposed to AMD64.  They also
> mentioned something about perhaps compiler switches, but so far I haven't heard
> back, nor have I had a chance to test further.
> 
> The Xeon was running 5.3/i386.  I believe the AMD was running 5.4/AMD64.
> 
> If anyone has any ideas as to what might be the cause, I would be interested in
> hearing.  I'm getting ready to load i386 on the AMD (using a spare drive) just
> to see if this makes a difference.  Am I over looking something that is required
> to unlock the power of the AMD?  The selects being twice as fast was great, but
> then again the AMD has two CPU's also.


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