Understanding runtime metrics

[xsoheilalizadeh]

I'm trying to build a dashboard with runtime the metrics the runtime event counter gives me and I want to understand a few of them to detect issues.

ThreadPool

Here I have this information to monitor the thread pool,

How can I understand if I have thread pool starvation here?

If the numbers of threads are more than the completed it means there is starvation or the number of queued is more than completed?

Memory

I see sometimes the ratio goes up 90% but I don't know what's the normal percentage and how I can find the root cause.

What Time in GC means here if it has a high percentage what are the side effects and how I can find the root cause?

[xsoheilalizadeh]

If ThreadPool.PendingWorkItemCount is bigger than ThreadPool.ThreadCount, it means that there is thread pool starvation?

@kouvel

[davidfowl]

https://learn.microsoft.com/en-us/dotnet/core/diagnostics/debug-threadpool-starvation