I'm running unbound version 1.17.0 on FreeBSD 12.2,
For unknow reason I have high query response time for some domains. For example when I run the query for "OKR.com" it takes around 4 Seconds to get the answer back.Knowing that there is no network issue, this happens from some domains.
even from the server it self.
[root@Resolver01 ~]# dig -t A okr.com @127.0.0.1
; <<>> DiG 9.16.26 <<>> -t A okr.com @127.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4788
;; flags: qr rd ra; QUERY: 1, ANSWER: 10, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1472
;; QUESTION SECTION:
;okr.com. IN A
;; ANSWER SECTION:
okr.com. 600 IN CNAME okr.com.w.cdngslb.com.
okr.com.w.cdngslb.com. 60 IN CNAME okr.com.queniurc.com.
okr.com.queniurc.com. 60 IN A 47.246.49.228
okr.com.queniurc.com. 60 IN A 47.246.49.231
okr.com.queniurc.com. 60 IN A 47.246.49.230
okr.com.queniurc.com. 60 IN A 47.246.49.226
okr.com.queniurc.com. 60 IN A 47.246.49.225
okr.com.queniurc.com. 60 IN A 47.246.49.227
okr.com.queniurc.com. 60 IN A 47.246.49.229
okr.com.queniurc.com. 60 IN A 47.246.49.232
;; Query time: 4444 msec <<------------>> Time Taken:~ 4 Seconds
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu Jan 19 21:06:17 +0330 2023
;; MSG SIZE rcvd: 227
Questions:
1- What is the reason for this issue?
2- Is there any possible solutions to get the names of domains, which takes high response time?
