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Telemetry Alert for FORGET_SKIPPABLE_FREQUENCY on 2019-11-27
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telemetr...@mozilla.com
Dec 1, 2019, 12:36:57 AM12/1/19
to sm...@mozilla.com, dev-telemet...@mozilla.org, dev-teleme...@lists.mozilla.org
We have detected a change in the Telemetry probe FORGET_SKIPPABLE_FREQUENCY in Firefox Nightly builds from 2019-11-27.
Alert details: http://alerts.telemetry.mozilla.org/index.html#/detectors/1/metrics/2732/alerts/?from=2019-11-27&to=2019-11-27
Changes new to Nightly builds on 2019-11-27: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=bcbb45f7d4f1b22fc74d2ee96b92c6f2233495aa&tochange=62ae0fda7cb68083be9105243de87e58b90a5dc1
The value of FORGET_SKIPPABLE_FREQUENCY over time: https://telemetry.mozilla.org/new-pipeline/evo.html#!measure=FORGET_SKIPPABLE_FREQUENCY
What to do about this:
1. File a bug to track your investigation. You can just copy this email into the bug Description to get you started.
2. Reply-All to this email to let the list know that you are investigating. Include the bug number so we can help out.
3. Triage the alert. You can find instructions here: https://docs.telemetry.mozilla.org/tools/alerts.html#triaging-a-telemetry-alert-email
If you have any problems, please ask for help on the #telemetry IRC channel or on Slack in #fx-metrics. We'll give you a hand.
What this is:
We have a system called cerberus[1] that compares Telemetry collected on different Nightly builds and looks for sudden changed in value distributions using the Bhattacharyya Distance[2]. It found such a change in FORGET_SKIPPABLE_FREQUENCY on 2019-11-27 so it asked its buddy medusa[3] to send this email to the dev-telemetry-alerts mailing list and to all email addresses listed in the alert_emails field of FORGET_SKIPPABLE_FREQUENCY's definition.
You can do this!
Your Friendly, Neighbourhood Firefox Telemetry Team
[1]: https://github.com/mozilla/cerberus
[2]: https://en.wikipedia.org/wiki/Bhattacharyya_distance
[3]: https://github.com/mozilla/medusa
Alert details: http://alerts.telemetry.mozilla.org/index.html#/detectors/1/metrics/2732/alerts/?from=2019-11-27&to=2019-11-27
Changes new to Nightly builds on 2019-11-27: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=bcbb45f7d4f1b22fc74d2ee96b92c6f2233495aa&tochange=62ae0fda7cb68083be9105243de87e58b90a5dc1
The value of FORGET_SKIPPABLE_FREQUENCY over time: https://telemetry.mozilla.org/new-pipeline/evo.html#!measure=FORGET_SKIPPABLE_FREQUENCY
What to do about this:
1. File a bug to track your investigation. You can just copy this email into the bug Description to get you started.
2. Reply-All to this email to let the list know that you are investigating. Include the bug number so we can help out.
3. Triage the alert. You can find instructions here: https://docs.telemetry.mozilla.org/tools/alerts.html#triaging-a-telemetry-alert-email
If you have any problems, please ask for help on the #telemetry IRC channel or on Slack in #fx-metrics. We'll give you a hand.
What this is:
We have a system called cerberus[1] that compares Telemetry collected on different Nightly builds and looks for sudden changed in value distributions using the Bhattacharyya Distance[2]. It found such a change in FORGET_SKIPPABLE_FREQUENCY on 2019-11-27 so it asked its buddy medusa[3] to send this email to the dev-telemetry-alerts mailing list and to all email addresses listed in the alert_emails field of FORGET_SKIPPABLE_FREQUENCY's definition.
You can do this!
Your Friendly, Neighbourhood Firefox Telemetry Team
[1]: https://github.com/mozilla/cerberus
[2]: https://en.wikipedia.org/wiki/Bhattacharyya_distance
[3]: https://github.com/mozilla/medusa
Jon Coppeard
Dec 2, 2019, 5:21:03 AM12/2/19
to telemetr...@mozilla.com, sm...@mozilla.com, dev-telemet...@mozilla.org, dev-teleme...@lists.mozilla.org
This is almost certainly due to my changes in bug 1599445. I've filed
bug 1600565 to investigate.
Jon
> _______________________________________________
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> dev-telemet...@mozilla.org
> https://mail.mozilla.org/listinfo/dev-telemetry-gc-alerts
bug 1600565 to investigate.
Jon
> dev-telemetry-gc-alerts mailing list
> dev-telemet...@mozilla.org
> https://mail.mozilla.org/listinfo/dev-telemetry-gc-alerts
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