On 2011-06-14, Kevin Chadwick <[email protected]> wrote: >> >> Seriously, the OpenBSD devs tend to eschew "knobs", and they probably >> found a good way to eliminate these, as someone stated. But then again >> there _were_ an awful lot of those questions... > > I'm sure that's part of the motivation but these are now automatically > and dynamically tuned now. There was some discussion about bringing > them back for particular cases as an override. Not sure or can't > remember what the outcome was, many would leave them on and get worse > performance as a result and I think the particular case brought up was > already catered for.
It may be useful to have an override in some special cases (though it would be better to tweak the autotuning algorithm if possible), but if there is some override, these particular sysctls are tainted. People would follow copy-n-paste guides and blindly set buffers to 256k per socket connection on busy servers "to improve performance" and wonder why their kernels were running out of memory and crashing.
