Minimize impact of NXDOMAIN requests

[Joe Shen]

Hi,

someone refer me to this list on discussing BIND
specific questions.

In fact, we are using BIND9.2.5, BIND9.3.1 as cache
server, which provide public service. I noticed that
the NXDOMAIN keep increasing. The amount of NXDOMAIN
forms a large part of cache server load. Is there any
method to minimize impact of such requests on BIND?

Joe


********************
I run "rndc stats" continuously( interval is less than
2 seconds), it's shown:

====================
success 17950622
referral 225680
nxrrset 1691861
nxdomain 11203490
recursion 3648017
failure 1363923
...
--- Statistics Dump --- (1116319437)
+++ Statistics Dump +++ (1116322885)
success 18889882
referral 229772
nxrrset 1809835
nxdomain 11474755
recursion 3825876
failure 1415044
....
--- Statistics Dump --- (1116322885)
+++ Statistics Dump +++ (1116322886)
success 18890342
referral 229772
nxrrset 1809868
nxdomain 11474873
recursion 3825976
failure 1415052
....
--- Statistics Dump --- (1116322886)
 
*********************







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