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Re: new benchmarks. WAS: FreeBSD MySQL still WAY slower than Linux: msg#00032

os.freebsd.performance

Subject: Re: new benchmarks. WAS: FreeBSD MySQL still WAY slower than Linux

On Friday, 2 December 2005 at 13:23:50 +1100, Michael Vince wrote:
> It would be good to actually see the Linux performance on the exact same
> hardware, all we ever see is how it is on FreeBSD.
>
> MySQL has very frequent use of queries of the system time and is
> well known in FreeBSD to be slower because its more expensive to
> call compared to Linux, which has less precision time.

I've heard this claim again and again, and I intend to look at it when
I have time. I find it difficult to believe that this alone could
explain the sometimes horrendous performance differences (3 to 1) that
have been reported.

Can somebody tell me:

1. How many calls there are per second?
2. Where they're coming from? This would involve profiling, of
course.

Greg
--
See complete headers for address and phone numbers.

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