Date: Wed, 22 Jun 2005 18:51:38 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: <freebsd-amd64@FreeBSD.org>, <ray@redshift.com> Subject: Re: Slower MySQL inserts for AMD64/Opteron? Message-ID: <0b2601c57753$0a0a8660$7f06000a@int.mediasurface.com> References: <3.0.1.32.20050622104159.00a55450@pop.redshift.com>
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Too many variables there too draw any conclusions from the comparison.
Compare like for like.
Steve / K
----- Original Message -----
From: <ray@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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