new benchmarks. WAS: FreeBSD MySQL still WAY slower than Linux
davidxu at freebsd.org
Thu Dec 8 16:23:03 PST 2005
Greg 'groggy' Lehey wrote:
>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
>See complete headers for address and phone numbers.
You find ktrace result of mysql:
gettimeofday() almost follows every network I/O.
Also you can find its I/O size:
I guess the gettimeofday() call is relevant to mysql's
connection keepalive work, sounds like a very silly method.
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