DNS Time is Always shows zero in Real User Monitoring

[AjinThankachan]

Hi,
In the Skywalking Demo UI the DNS time is always shows zero. I have tried to to work on my own environment as well the result is same for RUM monitoring using the client JS. Can you tell me is it a bug or did we miss somehing? Thanks for the help in advance.

[wu-sheng]

Can't see your screenshot.

[AjinThankachan]

Sorry i will try to upload again.In the demo instance this is the link :http://demo.skywalking.apache.org/dashboard/BROWSER/Endpoint/YWdlbnQ6OnVp.1/YWdlbnQ6OnVp.1_L2hvbWVwYWdl/Browser-Page

In Page Performace dns_avg always shows zero.

[wu-sheng]

@Fine0830 Where do we get dns metrics?

@AjinThankachan I think you could follow the above answer and check your env. AFAIK, DNS is not doing for every request.

[AjinThankachan]

Hi ,

dnsTime:parseInt(String(t.domainLookupEnd-t.domainLookupStart),10)
Is the code that is using the dnTime fetching in Cleint Js i guess. And in the types:
export type IPerfDetail = {
redirectTime: number | undefined; // Time of redirection
dnsTime: number | undefined; // DNS query time

[AjinThankachan]

@Fine0830 can you help ?