1915396 - Glean Database Flush time-based experiment on Fenix

Status: RESOLVED FIXED

(Data Platform and Tools :: Glean: SDK, task, P1)

Description

[Jan-Erik Rediger [:janerik]]

Hypothesis: We are potentially losing some metrics, because we never reach the required number of writes and thus never flush them to disk.
By flushing at least every few seconds we should be able to reliably persist these metrics, while not causing high disk IO or CPU usage.

Experiment: https://experimenter.services.mozilla.com/nimbus/glean-database-flush-time-based/summary
3 branches:

1. control - no change
2. treatment-a - 2s flush time
3. treatment-b - 10s flush time

Comment 1

[Jan-Erik Rediger [:janerik]]

Attachment: Glean Database Flush time-based experiment - analysis

Travis, please take a look at the final analysis.

Comment 2

[Travis Long [:travis_]]

I agree with your analysis and outcome. Adding a 2s flush timer will increase the quality of the data significantly at the cost of slightly more time spent writing to disk.

r+ from me