This represents the number of packets waiting for database attention. During normal operations the queue should be small.
</para>
- <para>
- Much the same holds for the <command>wildcards</command> setting. On by default, each non-existent query will lead to a number of additional
- wildcard queries. If it is known that the backends do not contain wildcard records, performance can be improved by adding <command>wildcards=no</command>
- to <filename>pdns.conf</filename>.
- </para>
<para>
Logging truly kills performance as answering a question from the cache is an order of magnitude less work than logging a
line about it. Busy sites will prefer to turn <command>log-dns-details</command> off.