On 24/03/2016 16:41, Tony Finch wrote: > When I changed our TTLs from 24h to 1h last year, it didn't have a visible > effect on authoritative server query load, much to my surprise.
I'm not that surprised - there's definitely not a linear correlation between the TTL of an RRset and how frequently it's queried. Unless your TTL is very short, forced expulsion from cache (due to cache-size limits) would cause many clients to re-query for a record far more frequently than once-per-TTL. Ray _______________________________________________ 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
