[FLINK-12680] Add timer type to metric system

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Component/s: Runtime / Metrics
• Assignee: Unassigned
• Reporter: Piyush Goyal
• Created: 30/May/19 01:46
• Updated: 02/Oct/19 17:48
• Resolved: 04/Jun/19 11:30

Description

Currently Flink metric system supports counter, gauge, histogram and meter. For cases which involve measuring the latency of short-term events (such as request latency in the context of a connector), none of these metric types is a good fit. Most metric system supports a timer type which is highly useful in such cases. Timers are useful for measuring short-duration latencies and the frequency of such events. All implementations of Timer report at least the total time and count of events as separate time series.

Timer type will be a nice addition to the existing metric types in Flink. We are happy to contribute it if there is agreement on it being a good addition.

Issue Links

• duplicates: FLINK-12423 Add Timer metric type for flink-metrics module