mysql performance tuning @ FreeBSD6

Dr. Rich Murphey Rich at
Sat Jan 28 07:52:39 PST 2006

Michael Vince wrote:
> Joao Barros wrote:
>> On 1/26/06, Mike Jakubik <mikej at> wrote:
>>> Rich Murphey wrote:
>>>> I'm curious whether Robert's patch might have an
>>>> effect on samba3 performance as well.
>>> No real difference here, tried ACPI-fast, i8254, and TSC. :( My
>>> transfers still average at 10MB/s (although it did peak at 20MB/s once)
>>> Which is really horrible for a em gigabit link with jumbo frames
>>> enabled. The performance of Samba on FreeBSD just stinks, for unknown
>>> reasons.
>> No real difference here too...
>> I started a thread on that subject not long ago and following Robert's
>> tip setting net.inet.tcp.inflight.enable=0 yielded better results.
>> -- 
>> Joao Barros
>> _______________________________________________
> With the new TCP/IP stack replacement and major updates to the em 
> driver in FreeBSD -current this should all turn around. I believe I 
> saw a cvs commit for em a little while ago saying the new em driver 
> can achieve higher transfer rates then using em with polling enabled.
> Hopefully this stuff will make it into 6.1-Release
> Mike

I'm using both polling on the em interfaces
and net.inet.tcp.inflight.enable=0 w/6.0 release.

Without these, I still see a a repeatable
10% or so increase when switching
from i8254 to TSC timecounter.


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