Why is MySQL nearly twice as fast on Linux/AMD64 Vs.FreeBSD/AMD64?

Steven Hartland killing at multiplay.co.uk
Fri May 21 09:58:50 PDT 2004

As the benchmark is still looking network dependent 0 -> 6ms RR times
I'd try the bge tweak Andrew suggested:
Without adding an interface, I'd just suggest doing something
like changing sc->bge_rx_max_coal_bds from 64 to 1 around like 2350 of
dev/bge/if_bge.c, rebuilding the driver, and seeing what changes.  I'm
betting that will turn off recv interrupt coalescing and reduce your
latency some.
It may be the source of your issue.

Also compare local to local and see how that shapes up, as it will
give an indication of where any issue lies i.e. threading / process
or network.

    Steve / K

----- Original Message ----- 
From: "JG" 

> So the results above were the best so far.
> Strange that using the my-huge.cnf would produce worse results.
> I guess that's a question for the Mandrake list though.
> Anyway, the closest FreeBSD came so far was under 32-bit i386 (on AMD64 
> hardware) :-(
> - Using my-huge.cnf
> - Using SCHED_4BSD kernel
> - Using mysql compiled with linuxthreads
> - (see a couple posts back for complete details)

This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. 

In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137
or return the E.mail to postmaster at multiplay.co.uk.

More information about the freebsd-amd64 mailing list