Why is MySQL nearly twice as fast on Linux/AMD64Vs.FreeBSD/AMD64?

Steven Hartland killing at multiplay.co.uk
Fri May 21 09:07:05 PDT 2004

Thanks muchly for that Andrew will try that.

Looking at the results from the netperf test posted here:

so I'd say yes to your question. The machine moved home today
( my bedroom -> datacenter ), thank goodness its was a noisy beast.
So will have to wait till it gets installed, some time tonight, before
I can test.


----- Original Message ----- 
From: "Andrew Gallatin"
> Nice work.  Does this translate pretty much directly into netperf
> request/response results? (netperf -tTCP_RR -Hremote)
> Assuming it does, have you tried "tuning" the bge interrupt coalescing
> params?  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.
> Drew

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