Zitat von "W.C.A. Wijngaards" <wouter at NLnetLabs.nl>: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi Sebastian, > > I am happy that you found a solution. > > On 11/10/2010 04:46 PM, Sebastian Nickel - Hetzner Online AG wrote: >> I tried "netstat -su" and it showed me many UDP send buffer errors. So I >> tried to set "net.core.wmem_max" to 8388608 (8m). It did not help. > > So it is the send buffer. > >> One last question: >> If I use "so-rcvbuf: 8m" in unbound.conf does this only set the >> appropiate kernel variables (like I did with sysctl) or is the value >> "8m" used in some calculations inside unbounds code, too? > > No, it only uses the 8m to set a parameter on the socket itself (that > overrides the kernel variable). > > Your sysctl values seem to be about setting the send buffer as well, and > perhaps the socket parameter call for the send buffer could be useful; > so that only that socket gets the large send buffer; not all of them (OK > you have 12G :-) ). I suspect doubling the "net.core.wmem_default" was the solution but this apply to all sockets without explicit settings, so a so-sndbuf setting would be useful. Regards Andreas