> On 18 Feb 2016, at 18:59, Robert Edmonds <edmo...@mycre.ws> wrote: > > A large proportion of records are only ever used "once, or a handful of > times", according to researchers: [...]
Yes, and there's an amazing amount of crap in the cache too. About 14% of our cache is weird Sonicwall geoip records, which are probably only used once but have a 1week TTL. Sigh! They are relatively fast to re-query, though. (I wonder if this screws up Sonicwall's stats...) > If there were some way to only dump the most popular records from the cache > (say the top 1,000 or 10,000), it would probably speed up the pre-heating > process significantly and still warm the cache to an acceptable degree. Yes, that would be cool. There's also a performance problem somewhere in adns-masterfile - it can only manage about 5000 qps before running out of CPU; I have done over 20000 qps with adns before (querying the Alexa top-1m list) so it ought to be possible to go a lot faster. > Does rndc dumpdb dump the cache in DNS tree order, or could it be convinced > to follow the LRU order? At the moment it is DNS tree order. Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
