Hi Alexandre, On 08/02/2018 12:07 PM, Alexandre Wicquart via Unbound-users wrote: > Hello, > > > I'm currently benchmarking EDNS client module for unbound and i can > handle about 75/80% less than before. > > > The tests are made on a Debian Stretch 9.5 with unbound 1.7.3 (I have > the same results with 1.6.7). > > My server can handle about 280k req/sec without UDP errors and a minimal > configuration. > > Once i add 'subnetcache' to module-config in my configuration my rate go > down to 55k req/sec. > > Over this limit, i have a lot of UDP errors.
If what you are suffering from is UDP errors, and not really performance of edns-client-subnet. Then there are a couple of options in unbound.conf that you can tune. so-reuseport: yes increases performance and may remove UDP errors, this may happen by spreading the queries over threads more equally so they do not get lost. so-rcvbuf: 4m and so-sndbuf: 4m may remove UDP errors, caused by the UDP buffers that can only have a number of queries waiting and unbound momentarily occupied by processing elsewhere. num-threads should also increase performance; if you haven't set it, it is at 1 and could go up to your number of cores. Best regards, Wouter > > > I have tried to tune some options related to EDNS in unbound.conf, but > it doesn't change anything. > > Is there a know issue on unbound performance when enabling this feature ? > > > Best Regards > > -- > > Alex >