Good DNS Response Times

[edmund81]

What is a Good Response Time for a DNS Server. Compared to most how good is 6ms, and also how come if I do a few tests in a row it keeps going between about 6ms, 8ms and 11ms, it's BIND on Ubuntu?

[Smith6612]

What specific part of the DNS Server are you benchmarking? Cached, Uncached, failed DNS lookups? Also, is this running on localhost or is this on another machine internal to your network, or external?

[edmund81]

I'm using the 'dig' command on Ubuntu and it's on a server on my network

[Smith6612]

For a local network, a cached DNS lookup should return within the time frame you are seeing. Under ideal caching conditions on an Ethernet connection you should be receiving a reply within 2ms. For the most part, just as long as you are seeing replies on the local network no higher than 15ms, it should be fine in terms of performance. For DNS Lookups, if they are needed, they should take no more than 100ms.