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<html><head><meta content="text/html; charset=utf-8" http-equiv="Content-Type"></head>Hello 姜伯洋,<br><br>Logging of "unreachables" is not possible as far as I know. Although it would be a handy feature.<br>You could try "rec_control trace-regex '.*'". But this produces a huge amount of log and possibly decreases the Recursor performance.<br><br>Winfried<br><br><div class="gmail_quote">Am 31. Juli 2019 08:41:00 MESZ schrieb "姜伯洋" <15555513217@163.com>:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>[root@ops-dns-recursor-1 ~]# rec_control get unreachables</div><div>342</div><br>As you can see, the number of times my recursor has not reached the authoritative server is increasing every day. How can I troubleshoot this? When the counter is incremented, will the relevant log be recorded?<br><br><br><div style="position:relative;zoom:1"></div><div id="divNeteaseMailCard"></div><br>At 2019-07-31 14:24:47, abang@t-ipnet.net wrote:<br> <blockquote id="isReplyContent" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Hello 姜伯洋,<br><br>If the Recursor does not reach an authoritative nameserver when resolving a domain, this counter is incremented by 1. The cause is usually not the Recursor.<br><br>See <a href="https://doc.powerdns.com/recursor/metrics.html">https://doc.powerdns.com/recursor/metrics.html</a><br><br>Winfried<br><br><div class="gmail_quote">Am 31. Juli 2019 05:51:36 MESZ schrieb "姜伯洋" <15555513217@163.com>:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>[root@ops-dns-recursor-1 ~]# rec_control get unreachables</div><div>333</div><div><br></div><div><div>Hello everyone</div><div><br></div><div>I want to know what will lead to an increase in this indicator. What effect will it have? How can I optimize recursor?</div></div></div><br><br><span title="neteasefooter"><p><br> </p></span></blockquote></div></blockquote></div><br><br><span title="neteasefooter"><p><br/> </p></span></blockquote></div></html>