[Unbound-users] Requestlist size difference 1.3.4 / 1.4.6
wouter at NLnetLabs.nl
Thu Sep 9 13:54:42 UTC 2010
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On 09/09/2010 03:40 PM, Paul Wouters wrote:
> On Thu, 9 Sep 2010, W.C.A. Wijngaards wrote:
> And prefetching low TTL records?
No, this did not exist in 1.3.4, thus it is not enabled for him.
I suspect this change:
18 February 2010: No more blacklisting of unresponsive servers, a 2
minute timeout is backed off to.
And I saw that the requestlist he included is full of unresponsive
servers. This fits with the graphs he sent, that see no increase in CPU
(it does not do anything but waiting) with extra entries (thus those
entries are on a long timeout).
Looks like a tradeoff between how much work to put into trying to
resolve to bad servers (: 16 lost packets, huge timeout). Otherwise the
server used to be blacklisted for 15 minutes (infra-ttl).
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