On Thu, Apr 28, 2011 at 03:25:53PM +0100, Steven Hartland wrote: > * What's your traffic like? e.g. http, large tcp files, tiny udp etc... > * Is it all on a local switch, if so what switch? > * Is flow control enabled? > * Are you seeing high interrupts? > * Are you disk bound? > * Are you memory bound? > * Are you cpu bound? > > Some basic settings we have here:- > net.inet.tcp.inflight.enable=0 > net.inet.tcp.sendspace=65536 > kern.ipc.nmbclusters=262144 > kern.ipc.maxsockets=204800 > net.inet.tcp.msl=20000 > kern.ipc.maxsockbuf=524288 > net.inet.tcp.sendbuf_max=16777216 > net.inet.tcp.recvbuf_max=16777216 > > Note: Large values for kern.ipc.maxsockbuf can hurt performance under > 8.x but work well under 7.x (never got to the bottom of that) > > Regards > Steve > > > ================================================ > 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 +44 845 868 1337 > or return the E.mail to postmas...@multiplay.co.uk. >
I was using the default value for maxsockbuf, doesn't seem to hurt or help. The only value you've listed that I didn't have tweaked to a comparable value already was the nmbclusters, changing it seems to have no effect, though. vmstat -i should display my interrupts, which I don't think are particularly high. I am most definitely not CPU bound (utilization shows no hot CPUs), I have 16GB of memory and plenty allocated to the kernel, and I believe flow control is enabled (should it not be?): net.inet.flowtable.enable: 1 It's a 16 port netgear gigabit prosafe switch, and it's not likely to be the problem (like I said, the Linux hosts have no issues with the same card). -- Adam Stylinski PGP Key: http://pohl.ececs.uc.edu/~adam/publickey.pub Blog: http://technicallyliving.blogspot.com
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