Add GC heap size and count in Runtime metrics #412
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| Measurement<long>[] measurements = new Measurement<long>[NumberOfGenerations]; | ||
| for (int i = 0; i < measurements.Length; i++) | ||
| { | ||
| measurements[i] = new Measurement<long>(GC.CollectionCount(i), new KeyValuePair<string, object>("gen", HeapNames[i])); |
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"gen" might be too "generic" ?
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I think it won't be if it appears together with a value from ("gen0", "gen1", "gen2", "loh", "poh"). However I'm ok to better name suggestions like "generation" or "generationName".
Can I keep it as is and update this attribute key accordingly once #404 is finalized?
…ntelemetry-dotnet-contrib into xiang17/addGCCounter # Conflicts: # src/OpenTelemetry.Instrumentation.Runtime/CHANGELOG.md
… avoid allocation on each collect
…ntelemetry-dotnet-contrib into xiang17/addGCCounter
# Conflicts: # src/OpenTelemetry.Instrumentation.Runtime/CHANGELOG.md # src/OpenTelemetry.Instrumentation.Runtime/RuntimeMetrics.cs
| return new[] | ||
| var generationInfo = GC.GetGCMemoryInfo().GenerationInfo; | ||
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| Measurement<long>[] measurements = new Measurement<long>[generationInfo.Length]; |
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This will cause allocation. We could either use a pre allocated array/list or make use of the yield return semantic.
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This metrics is an Observable and gets called once every 15~20 seconds. So it's not worth doing too much optimization for now. Most importantly, if there are multiple readers reading it at almost the same time, they could have incorrect values from reading pre allocated shared array.
I've tried to use yield return and it worked for two other methods, however, for this one I got an error. See discussion thread at #412 (comment)
The compile will fail with GetGarbageCollectionHeapSizes because it needs a
Span<T>: "CS4013 Instance of type 'ReadOnlySpan' cannot be used inside a nested function, query expression, iterator block or async method".
* Add `gc.heapsize` and change `gc.count` to multi-dimensional metrics
Fixes #335.
Changes
Add
gc.heapsizeand changegc.countto multi-dimensional metricsFor significant contributions please make sure you have completed the following items:
CHANGELOG.mdupdated for non-trivial changes