In my experience, ~0,06% (unreachables/all-outqueries) is normal.

Winfried

Am 31. Juli 2019 10:21:09 MESZ schrieb "姜伯洋" <15555513...@163.com>:
>
>
>
>Can I understand the unreachables indicator as a normal count?
>
>
>
>At 2019-07-31 14:24:47, ab...@t-ipnet.net wrote:
>Hello 姜伯洋,
>
>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.
>
>See https://doc.powerdns.com/recursor/metrics.html
>
>Winfried
>
>
>Am 31. Juli 2019 05:51:36 MESZ schrieb "姜伯洋" <15555513...@163.com>:
>[root@ops-dns-recursor-1 ~]# rec_control get unreachables
>333
>
>
>Hello everyone
>
>
>I want to know what will lead to an increase in this indicator. What
>effect will it have? How can I optimize recursor?
>
>
>
>
>
> 
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