2012/7/10 Shon Stephens <ssteph...@mentora.com>:
> Dear All,
>
> I am running the version of BIND provided by RPM packages with RHEL
> 6.2. This is a new server build replacing a previous server. That host was
> running an earlier version of BIND and and earlier version of RHEL. The
> config files have remained relatively the same, but the CPU utilization of
> the newer version is magnitudes of order higher.
>
>
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
> COMMAND
>
> 30462 named 20 0 282m 80m 2588 S 43.5 2.1
> 378:33.05 named
>
>
>
> I've seen other posts about missing "managed-keys" directive and attempted
> to add that to my config as a solution. This does not seem to help. Here is
> my named.conf (sanitized). I've made sure that recursion is limited to our
> ACL and there doesn't seem to be any difference from previous periods in the
> number of queries being answered by the server. Any help is much
> appreciated.
>
>
>
> Yours,
> Shon
>
>
>
>
>
> ~]# rndc status
>
> version: 9.7.3-P3-RedHat-9.7.3-8.P3.el6_2.3
>
> CPUs found: 2
>
> worker threads: 2
>
> number of zones: 84
>
> debug level: 0
>
> xfers running: 0
>
> xfers deferred: 0
>
> soa queries in progress: 0
>
> query logging is ON
>
> recursive clients: 6/0/1000
>
> tcp clients: 0/100
>
> server is up and running
>
>
>
> // named.conf - BIND name server configuration file
>
> include "/etc/rndc.key";
>
> controls {
>
> inet 127.0.0.1 port 953
>
> allow { 127.0.0.1; };
>
> };
>
> // Blackhole requests from these networks
>
> acl "bogusnets" {
>
> 0.0.0.0/8;
>
> 1.0.0.0/8;
>
> 2.0.0.0/8;
>
> 192.0.2.0/24;
>
> 224.0.0.0/3;
>
> };
>
> // Trusted networks
>
> acl "trusted" {
>
> some_trusted_networks;
>
> };
>
> // Trusted name servers
>
> acl "nameservers" {
>
> some_ips_of_nameservers;
>
> };
>
> // Global config options
>
> options {
>
> directory "/var/named";
>
> dump-file "data/cache_dump.db";
>
> statistics-file "data/named_stats.txt";
>
> managed-keys-directory "/var/named/dynamic";
>
> blackhole { "bogusnets"; };
>
> allow-query { any; };
>
> allow-query-cache { "trusted"; };
>
> allow-recursion { "trusted"; };
>
> allow-transfer { "nameservers"; };
>
> transfer-source 192.168.101.101;
>
> also-notify { "nameservers"; };
>
> allow-notify { "nameservers" };
>
> notify explicit;
>
> dnssec-enable no;
>
> dnssec-validation no;
>
> listen-on-v6 { none; };
>
> };
>
> server 192.168.101.101 {
>
> edns no;
>
> };
>
> logging {
>
> channel "misc" {
>
> file "logs/named.log" versions 4 size 2m;
>
> print-category yes;
>
> print-severity yes;
>
> print-time yes;
>
> };
>
> channel "xfers" {
>
> file "logs/named.xfers" versions 4 size 1m;
>
> print-severity yes;
>
> print-time yes;
>
> };
>
> channel "debug" {
>
> file "logs/named.debug" versions 1 size 2m;
>
> print-category yes;
>
> print-severity yes;
>
> print-time yes;
>
> };
>
> channel "ops" {
>
> file "logs/named.ops" versions 3 size 2m;
>
> print-category yes;
>
> print-severity yes;
>
> print-time yes;
>
> };
>
> channel "sys" {
>
> syslog daemon;
>
> print-category yes;
>
> };
>
> category "xfer-in" { "xfers"; };
>
> category "xfer-out" { "xfers"; };
>
> category "notify" { "xfers"; };
>
> category "database" { "debug"; };
>
> category "config" { "debug"; };
>
> category "queries" { "ops"; };
>
> category "client" { "ops"; };
>
> category "resolver" { "ops"; };
>
> category "security" { "sys"; "misc"; };
>
> category "default" { "misc"; };
>
> };
Maybe it's caused by too many logging. Try disable them temporarilly,
or run named with "-g" argument in foreground, watch if there's
something unusal or appeared repeatedly.
Another method you can try is simplify your named.conf to track down
where the problem is. If it's not configuration problem, than it's
named maybe problematic.
> // Default zones
>
> zone "." {
>
> type hint;
>
> file "zones/root/db.root";
>
> };
>
> zone "localhost" {
>
> type master;
>
> file "zones/local/db.local";
>
> };
>
> zone "127.in-addr.arpa" {
>
> type master;
>
> file "zones/local/db.127";
>
> };
>
> zone "0.in-addr.arpa" {
>
> type master;
>
> file "zones/local/db.0";
>
> };
>
> zone "255.in-addr.arpa" {
>
> type master;
>
> file "zones/local/db.255";
>
> };
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