New daily logins for the library look fine, so I don't think this is a total outage of TWL notifications.

@Samwalton9-WMF

I have analysed the logs, and there is no outage of TWL notifications. Although, the overall number notifications sent has decreased over time, there hasn't been any significant change in the last few weeks/months.

Average daily number of notifications sent by month

Also, I realized this after our conversation, the Echo EventLogging instrumentation was for user interactions of Echo notifications, but the actual Echo notification logs are available in the MediaWIki extension databases, echo_event and echo_notification, which are in use.

For regular monitoring, a Superset dashboard can be setup. Unless we need more data related how users are interacting with TWL notifications (apart notification_read_timestamp which is available in echo_notification table), we don't need any new instrumentation or data collection.

Thanks @KCVelaga_WMF! This confirms that we haven't had any sudden outage or bug, so we can go looking elsewhere. A slow decrease to a steady state is expected.

I think as long as your queries are saved somewhere (maybe here in Phab would be helpful), we can check on this if we're ever concerned but I think we need to set up dashboards.

@Samwalton9-WMF Sure, let's talk about the dashboard when we meet next. Here is the notebook and the query (P52969).