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When troubleshooting issues, on-call engineers want as much information as possible to quickly identify the root cause. To expedite problem resolution, you can overlay change events on tracing data to help determine whether a code deploy, alerting monitor, feature flag, or other change in your environment might have caused, or correlates to, the issue you’re trying to solve. Overlaying change events on tracing data adds vertical lines to the tracing timeline graph, which responds to criteria you add in the Query builder. You can pin individual or groups of change events to the graph, and then explore the details of what changed, where the change occurred, and when the change happened. To overlay change events on tracing data:
  1. In the navigation menu select Explorers > Trace Explorer.
  2. Choose the time period to display results for, which defaults to the last 15 minutes.
  3. Use the Query builder to define a search, and then click Run.
  4. Click Events to open the Events panel.
  5. Select the event categories you want to display, and then click Save. The selected change event categories display on the timeline graph.
  6. In the timeline graph, click a change event or group of change events to pin them to the graph.
  7. In the pinned pane on the graph, click View details to display the Change event or Change event group panel. Use this panel to view details about the selected events, such as the source app that generated the event, when the event happened, and any links or labels associated with the event.
To view more details about the selected events, click Open in Changes Explorer to open Changes Explorer scoped to that query. In Changes Explorer, you can modify the filter to specify a different time period, and change the criteria included in the query.