too much activity

[Markus Plannerer]

Hello,

we have updated from BIND8 to BIND9 and in the new
named.conf logging is enabled by:
logging {
	channel query_logging {
		file "/var/log/named_querylog"
			versions 3 size 100M;
		print-time yes;			// timestamp log entries
	};
	category queries {
		query_logging;
	};
	category lame-servers { null; };
};

Now there is every second a entry in the log like:
Aug 09 20:05:17.017 client 127.0.0.1#32844: query: 
130.15.227.212.in-addr.arpa IN PTR
Aug 09 20:05:18.028 client 127.0.0.1#32844: query: 
130.15.227.212.in-addr.arpa IN PTR
Aug 09 20:05:19.027 client 127.0.0.1#32844: query: 
130.15.227.212.in-addr.arpa IN PTR
Aug 09 20:05:20.038 client 127.0.0.1#32844: query: 
130.15.227.212.in-addr.arpa IN PTR
and so on and so ...


Can anybody give me a hint?

Thanks Markus