On Sunday, December 4, 2011 13:24 CET, Camiel Dobbelaar <c...@sentia.nl> wrote: > On 4-12-2011 13:01, Sebastian Reitenbach wrote: > > the default maximum size of the tcp send and receive buffer used by the > > autosizing algorithm is way too small, when trying to get maximum speed > > with high bandwidth and high latency connections. > > I have tweaked SB_MAX on a system too, but it was for UDP. > > When running a busy Unbound resolver, the recommendation is too bump the > receive buffer to 4M or even 8M. See > http://unbound.net/documentation/howto_optimise.html > > Otherwise a lot of queries are dropped when the cache is cold. > > I don't think there's a magic value that's right for everyone, so a > sysctl would be nice. Maybe separate ones for tcp and udp. > > I know similar sysctl's have been removed recently, and that they are > sometimes abused, but I'd say we have two valid use cases now. > > So I'd love some more discussion. :-)
since they were removed, and there is this keep it simple, and too many knobs are bad attitude, which I think is not too bad, I just bumped the SB_MAX value. If there is consensus that a sysctl would make sense, I'd also look into that approach and send new patch. Sebastian > > -- > Cam
