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<p class="MsoNormal"><span lang="EN-US">We’ve used Unbound for a few months for around 15 000 clients I our company.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We recently had an issue when our Internet provider had a big network error.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This meant that our three unbound resolvers couldn’t perform recursion.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But during the outage, they stopped responding to any queries and the CPU spiked.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This meant that we couldn’t resolve local names.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">After the outage was resolved, they started responding as usual again.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Statistics before outage:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 11:40:21 unbound[1180:0] info: server stats for thread 0: 137441 queries, 107082 answers from cache, 30359 recursions, 0 prefetch<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 11:40:21 unbound[1180:0] info: server stats for thread 0: requestlist max 38 avg 4.54215 exceeded 0 jostled 0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 11:40:21 unbound[1180:0] info: average recursion processing time 0.120068 sec<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 11:40:21 unbound[1180:0] info: histogram of recursion processing times<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 11:40:21 unbound[1180:0] info: [25%]=0.00974991 median[50%]=0.0314827 [75%]=0.162277<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Statistics during outage:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 12:40:21 unbound[1180:0] info: server stats for thread 0: 717834 queries, 79368 answers from cache, 638466 recursions, 0 prefetch<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 12:40:21 unbound[1180:0] info: server stats for thread 0: requestlist max 893 avg 649.479 exceeded 520726 jostled 90153<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 12:40:21 unbound[1180:0] info: average recursion processing time 16.060234 sec<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 12:40:21 unbound[1180:0] info: histogram of recursion processing times<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">2013-08-14 12:40:21 unbound[1180:0] info: [25%]=0.0128234 median[50%]=0.046963 [75%]=0.241531<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What can I do to make sure that Unbound still responds to a local query when there is an outage?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We run Unbound on Windows Server 2012 x64 (because we have more competence using Windows)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is it possible to overcome the 1024 limit for
<i>outgoing-range</i> and <i>num-queries-per-thread</i> when running Windows and would it have helped?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I would really appreciate comments and suggestions!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks!<o:p></o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="color:#1F497D;mso-fareast-language:SV"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="color:#1F497D;mso-fareast-language:SV">_________________________________________<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="color:#1F497D;mso-fareast-language:SV">Petter Lindgren</span></i><span lang="EN-US" style="color:#1F497D;mso-fareast-language:SV"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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