Bind named service high cpu load [closed] - cpu-usage

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named service under CentOs 6 is using more 100% of all 4 processors. I tried to play around with the configuration files. I currently have like 10 websites. below is a sample
$TTL 14400
# IN SOA ns1.mynameserver.com. hostmaster.mydomain.com. (
2012071300
14400
3600
1209600
86400 )
mydomain.com. 14400 IN NS ns1.mynameserver.com.
mydomain.com. 14400 IN NS ns2.mynameserver.com.
ftp 14400 IN A 123.218.168.8
localhost 14400 IN A 127.0.0.1
mail 14400 IN A 123.218.168.8
pop 14400 IN A 123.218.168.8
mydomain.com. 14400 IN A 123.218.168.8
smtp 14400 IN A 123.218.168.8
www 14400 IN A 123.218.168.8
mydomain.com. 14400 IN MX 10 mail
mydomain.com. 14400 IN TXT "v=spf1 a mx ip4:123.218.168.8 ~all"
localhost 14400 IN AAAA ::1
and for mynameserver.com
$TTL 14400
# IN SOA ns1.mynameserver.com. hostmaster.mynameserver.com. (
2012081200
14400
3600
1209600
86400 )
mynameserver.com. 14400 IN NS ns1.mynameserver.com.
mynameserver.com. 14400 IN NS ns2.mynameserver.com.
ftp 14400 IN A 123.218.168.11
localhost 14400 IN A 127.0.0.1
mail 14400 IN A 123.218.168.11
ns1.mynameserver.com. 14400 IN A 123.218.168.10
ns1.mynameserver.com. 14400 IN A 123.218.168.11
ns2.mynameserver.com. 14400 IN A 123.218.168.11
ns2.mynameserver.com. 14400 IN A 123.218.168.11
pop 14400 IN A 123.218.168.11
s1 14400 IN A 123.218.168.11
smtp 14400 IN A 123.218.168.11
mynameserver.com. 14400 IN A 123.218.168.11
www 14400 IN A 123.218.168.11
mynameserver.com. 14400 IN MX 10 mail
mynameserver.com. 14400 IN TXT "v=spf1 a mx ip4:123.218.168.8 ~all"
localhost 14400 IN AAAA ::1
i changed the ip and domains to make it a general question for everyone. Thing is i don't use mail or smtp at all, i might add MX records in the future and rely on gmail for example for emails. Is it safe to remove mail/pop/smtp/MX records?
Based on your experience what is causing this huge CPU load for several months!

Answer 1

I had the same issue, and the information in the link posted by Starcalc above worked for me (though the post he linked is for Ubuntu). This is what I did for my CentOS 6.4 box:
In /etc/named.conf, ensure you have the line present in the options{} section
managed-keys-directory "/var/named/dynamic";
Also, make sure you have the directories /var/named/dynamic and /var/named/chroot/var/named/dynamic presesent, ensure all are owned by named:named (easy way: chown -R named:named /var/named ) and if you run with SELinux, do: restorecon -R /var/named/

Answer 2

Check your /etc/named.conf file have managed-keys-directory "/var/named/dynamic"; in options scope.
Then check your bind files exist under both /var/named and /var/named/chroot/var/named directories.
Stop named service
#service stop named
Check or create files
#mkdir /var/named/data
#touch /var/named/data/named.run
#mkdir /var/named/dynamic
#touch/var/named/dynamic/managed-keys.bind
chroot files
#mkdir /var/named/chroot/data
#touch /var/named/chroot/data/named.run
#mkdir/var/named/chroot/var/named/dynamic
#touch /var/named/chroot/var/named/dynamic/managed-keys.bind
Don't forget to change owner of files.
#chown root:named -R /var/named/chroot/var/named/d*
start named daemon
#service named start