Proxmox pveperf ext DNS performance

[Moreiq]

Running pveperf I get I get DNS EXT 181 ms. However doing ping to external DNS gives 2.40 ms. Any idea where comes the difference ?

 

[dietmar]

A ping does not involve any DNS lookup ...

 

[janos]

You can check dns resolve time with dig:

dig google.com

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7 <<>> google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2866
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;google.com.                    IN      A

;; ANSWER SECTION:
google.com.             299     IN      A       216.58.214.206

;; Query time: 26 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sat May 19 21:45:38 CEST 2018
;; MSG SIZE  rcvd: 55

Query time: displaying the resolve time. This depend on the used DNS server mostly.