Library for tracking system metrics
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Library for tracking system metrics
License: BSD 3-Clause "New" or "Revised" License
This project forked from hasura/ekg-core
Library for tracking system metrics
License: BSD 3-Clause "New" or "Revised" License
This would be useful for catching regressions, but would also be necessary for any optimization work.
We currently sanitize metrics when we export them to Prometheus format. This is was for historical reasons: the export code was originally written as a Prometheus exporter for EKG metrics, which could not control the format of the metrics it was given. We should now try to validate the metrics at an earlier stage.
When registering a metric with the same identifier (name and labels) as a metric that at already exists in the metric store, the current behaviour is to replace the existing metric. This behaviour useful: it is part of a strategy to prevent race conditions between operations on the same metric. However, this behaviour silently masks errors where multiple metrics are accidentally registered under the same identifier. To prevent this silent masking, we could introduce variants of the registration function that, instead of silently replacing metrics, throw errors when there are identifier conflicts.
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