7 Things You Didn't Know About Prometheus | Little-Known Features and Implementation Details

In this video, I cover seven little-known features, behaviors, and implementation details in the Prometheus monitoring system that I find mildly interesting. How many of these did you know about?
Check out my Prometheus training courses if you want to learn Prometheus in a structured way from the ground up:
training.promlabs.com/
Chapters:
00:00 Introduction
00:32 Fact 1: Scrape Offsets
02:07 Fact 2: Metric Names in the TSDB
03:22 Fact 3: Alert "for" State Persistence
04:55 Fact 4: Scrape Formats
06:50 Fact 5: Active Query Tracking
08:07 Fact 6: Staleness Marker Encoding
10:43 Fact 7: Easter Eggs?
11:16 Outro & PromLabs Trainings
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[@oscarromeu2129]

Thank you Julius for sharing your knowledge. Great trainings in promlabs ❤

[@PromLabs]

Thank you Oscar, glad you like the training! :)

[@haouser]

Awsome! great and interesting content. Thanks for sharing it

[@GarvitJain_1]

Thank you very much for this information. got to learn more about the backend of Prometheus

[@AndreyTulenev]

thanks!

[@sparkfire1223]

Great videos, they are awesome! Could you maybe do a video on why NFS has odd issues with OOM, or generally not supported in prometheus? When deploying this in K8s NFS almost always seems like the defecto storage option so would be nice to understand why things are the way they are.

[@PromLabs]

Thank you! I don't know enough about NFS to really speak to that unfortunately. I do know we've settled on not supporting it officially because NFS apparently has all sorts of issues, including (if I remember correctly) not supporting all POSIX semantics we rely on correctly. But that's all just vague memories, others will know more :)