Strange recursor response time pattern
Matus UHLAR - fantomas
uhlar at fantomas.sk
Tue Sep 5 15:10:51 UTC 2017
On 05.09.17 16:44, Havard Eidnes wrote:
>It seems that every 10s, "on the clock", BIND will temporarily
>increase the query response time rather drastically for a short while,
>only to settle down to normal behaviour until the next 10s event.
>Any idea what might be causing this? Anything I can do to remedy
BIND keeps track of servers it's sending queries to and their RTTs to prefer
sending queries to servers that respond more quickly.
ocasionally, it re-sends queries even to slower or unreachable servers to
see if the situation changed.
what you see may be result of this algorithm.
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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