Hi Wouter, I'm running unbound on 8 threads server and in my unbound configuration, i already have this :
### server: num-threads: 8 so-reuseport: yes so-rcvbuf: 8m so-sndbuf: 8m ### At this point, i have no UDP errors @280k req/sec. It's the max i can handle with my server. Now if i add subnetcache : ### module-config: "subnetcache validator iterator" ### I can go to ~50k req/sec. Over 50k, i have the UDP errors and only with EDNS. For example, i try to send 100k req/sec, i will 100k packets IN on my network interface, 50k packets OUT, and 50K in UDP errors. It's really strange. Best Regards, -- Alex. * Wouter Wijngaards via Unbound-users <[email protected]> [2018:08:02 12:54 +0200]: > 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 > >
