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Understanding Host Metrics Graph and Memory Usage Rate

TLDR Div needed help understanding a host metrics graph and had issues with memory usage rate. Srikanth guided them to correct the legend format and advised against using rate on gauge metric.

6mo

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Apr 05, 2023 (6 months ago)

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Div

08:27 AM

Hi team, we have recently enabled host metrics for our service containers, and started receiving the CPU data like this, I am not sure what does F1 represent in this graph, can someone guide me to righht resources

08:28

Div

08:28 AM

here is the query used and Y Axis unit is in percentage

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Ankit

08:29 AM

Srikanth Can we add more details on this in docs too?
cc: Ashu

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Srikanth

08:33 AM

Div did you create the dashboard or did you import it from our repo? The legend format is missing for the formula.

Div

08:33 AM

I created this dashboard myself

Srikanth

08:34 AM

Please add the legend format {{state}} like you did for the first query. Otherwise it doesn’t know what to format and shows the query name

Div

08:35 AM

Ahh, got it, this was silly me, I also disabled the A and only displaying the Formula 👍

08:35

Div

08:35 AM

Thanks

08:37

Div

08:37 AM

Srikanth another quick query on this dashboard for process_memory_rss
its Rate_avg and in kilobyte, showing the values in negative as well, is this normal ?

Image 1 for <@4K1456> another quick query on this dashboard for `process_memory_rss`
its Rate_avg and in kilobyte, showing the values in negative as well, is this normal ?

Srikanth

08:45 AM

What is the SigNoz version you are using? And where are you getting this metric from? I want to see the metric type to check if the aggregation is appropriate.

Div

08:49 AM

Signoz : v0.17.0
we are using otel host metrics on our service to pass this data to Signoz, similary how we are sending the cpu and memory metrics

08:49

Div

08:49 AM

https://opentelemetry.io/docs/instrumentation/js/instrumentation/#using-observable-async-gauges

Srikanth

09:35 AM

Why are you trying to use rate on gauge metric?

Div

09:39 AM

hmm, Not sure If I understood this, I was hoping to get the rate of change in memory usage with time

09:42

Div

09:42 AM

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