[FLINK-4830] Show latency statistics in web interface

• Type: New Feature
• Status: Open
• Priority: Not a Priority
• Resolution: Unresolved
• Component/s: Runtime / Metrics, Runtime / Web Frontend
• Labels: auto-deprioritized-major auto-deprioritized-minor
• Assignee: Unassigned
• Reporter: Robert Metzger
• Created: 14/Oct/16 12:42
• Updated: 06/Feb/22 10:37

Description

With FLINK-3660, we added a metric that measures the latency of records flowing through the system.

With this JIRA, I would like to expose the latency also in the web frontend.
Therefore, we'll probably need to change the format the latency is reported in the metric.

I think we should show the latencies in two different views in the interface:

• A global end-to-end latency in the overview of running jobs. This number is probably pretty inaccurate, but should give users a first impression of the latency characteristics currently present in the job
• A detailed latency drill-down view, that allows to see how much latency is added on average at each operator, for the sources.