Exceptions: include Timer.ActiveCount in .NET Core stats #2500
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
We're seeing some instances of quite delayed timeouts and at least in two deeper investigations it was due to a huge number of timers firing and the backlog timeout assessment timer not triggering for an extended period of time. To help users diagnose this, adding the cheap counter to the .NET Core pool stats where
Timer.ActiveCount
is readily available.This is available in all the .NET (non-Framework) versions we support.
Before:
After:
See #2477 for another possible instance of this.