...
logging {
        channel update_debug {
                file "/var/log/bind_update_debug.log" versions 3 size 100k;
                severity debug;
                print-severity  yes;
                print-time      yes;
        };
        channel security_info {
                file "/var/log/bind_security_info.log" versions 1 size 100k;
                severity info;
                print-severity  yes;
                print-time      yes;
        };
        channel bind_log {
                file "/var/log/bind.log" versions 3 size 1m;
                severity info;
                print-category  yes;
                print-severity  yes;
                print-time      yes;
        };
	channel query_log {
		file "/var/log/bind_query.log" versions 3 size 1m;
		severity debug 3;
		print-category  yes;
                print-severity  yes;
		print-time yes;
	};

        category default { bind_log; };
	category queries { query_log; };
        category lame-servers { null; };
        category update { update_debug; };
        category update-security { update_debug; };
        category security { security_info; };
};
...