How to suppress these syslog messages

[Egan]

On Tue, 21 Nov 2000 22:39:03 -0500 (EST), Duncan Hill
<dhill at bajan.org> wrote:

>> How can I suppress these syslog messages:
>> 
>> >Nov 21 19:39:34 ns1 named[115]: Cleaned cache of 112 RRsets
>> >Nov 21 19:39:34 ns1 named[115]: USAGE 974853574 973576958 CPU=47.07u/24.13s
>> >Nov 21 19:39:34 ns1 named[115]: NSTATS 974853574 973576958 A=12799 PTR=4957
>> >Nov 21 19:39:34 ns1 named[115]: XSTATS 974853574 973576958 RR=13132 RNXD=435
>
>Read up on logging and update-interval.

Where?

At www.isc.org I could not find the command reference I saw a few
months ago.