#support

Understanding the Reason for Missing Spans

TLDR Bhuwan asked about the reason for missing spans. Ankit suggested some possible reasons like sampling, otel-collectors, load, and viewing incomplete traces.

6mo

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Mar 24, 2023 (6 months ago)

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Bhuwan

11:23 PM

Hi, Can anyone tell what is the reason of getting missing spans? I don't find any detail in the link too https://signoz.io/docs/userguide/traces/#missing-spans

Mar 27, 2023 (6 months ago)

Bhuwan

03:07 PM

Pranay I am still not clear on missing spans. Can any one guide on this?

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Ankit

03:59 PM

Bhuwan It might be due to
• sampling. Do you do some sampling before sending to SigNoz?
• otel-collectors at SigNoz or agents not sending all spans due to high load

03:59

Ankit

03:59 PM

Bhuwan how many spans/s are you sending to SigNoz?

04:03

Ankit

04:03 PM

3rd reason could be - you are viewing the spans in UI before a trace is complete. This is usually the case with long running request, background jobs, async services. How much time do you see a trace take when it has no missing spans. Probably check for an older data like 1hr, 6hr ago

Bhuwan

09:14 PM

Thank Ankit will check on this.

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