-bash-4.1$  sudo rndc status
Password:
version: 9.9.6-P2 <id:6e349439>
CPUs found: 24
worker threads: 24
UDP listeners per interface: 12
number of zones: 24213
debug level: 0
xfers running: 0
xfers deferred: 0
soa queries in progress: 6
query logging is OFF
recursive clients: 3676/199900/200000
tcp clients: 0/100
server is up and running
-bash-4.1$ tail -5 /var/named/var/log/named-verbose.log
17-Jun-2015 22:28:58.005 general: error: socket: file descriptor exceeds limit (4096/4096)
17-Jun-2015 22:28:58.006 general: error: socket: file descriptor exceeds limit (4096/4096)
17-Jun-2015 22:28:58.006 general: error: socket: file descriptor exceeds limit (4096/4096)
17-Jun-2015 22:28:58.006 general: error: socket: file descriptor exceeds limit (4096/4096)
17-Jun-2015 22:28:58.006 general: error: socket: file descriptor exceeds limit (4096/4096)
-bash-4.1$ sudo netstat -an|grep ':53' | wc -l
3584