SV: Bind bind high recv-q

Søren Andersen SOAN at
Fri Dec 4 10:15:17 UTC 2015

I forgot to mention

BIND 9.10.3 <id:2799933>
built by make with '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--program-prefix=' '--disable-dependency-tracking' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--with-libtool' '--localstatedir=/var' '--enable-threads' '--enable-ipv6' '--enable-filter-aaaa' '--with-pic' '--disable-static' '--disable-openssl-version-check' '--with-docbook-xsl=/usr/share/sgml/docbook/xsl-stylesheets' '--enable-fixed-rrset' '--enable-sit' '--enable-fetchlimit' '--with-gssapi=yes' '--disable-isc-spnego' '--with-tuning=large' '--with-geoip' '--with-python' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'CFLAGS= -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' 'LDFLAGS=-Wl,-z,relro ' 'CPPFLAGS= -DDIG_SIGCHASE'
compiled by GCC 4.8.3 20140911 (Red Hat 4.8.3-9)
compiled with OpenSSL version: OpenSSL 1.0.1e 11 Feb 2013
linked to OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013
compiled with libxml2 version: 2.9.1
linked to libxml2 version: 20901

Virtualized in vmware with VMXNET3 as netcard, and running CentOS Linux release 7.1.1503 (Core).

Any ideas to what I should be looking at would be appreciated.


Fra: bind-users-bounces at [mailto:bind-users-bounces at] På vegne af Søren Andersen
Sendt: 3. december 2015 22:36
Til: bind-users at
Emne: Bind bind high recv-q

Hello there,

I'm experiencing some strange problems with my bind installation. - I notice my bind recv-q is quite high sometimes.. therefore my DNS clients can experience DNS lookup to take 1-4 secs. My bind is running on a 4 core vm I VMware with 8Gb ram. - At peak I receive app. 700-800 QPS. - The load is 20-40% on each CPU core. - I've also configured 2 RPZ zones.

I don't know what I can do?

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