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[jira] [Created] (FLINK-10244) Add option to measure latency as absolute value

Chesnay Schepler created FLINK-10244:

             Summary: Add option to measure latency as absolute value
                 Key: FLINK-10244
                 URL: https://issues.apache.org/jira/browse/FLINK-10244
             Project: Flink
          Issue Type: Sub-task
          Components: Metrics
    Affects Versions: 1.7.0
            Reporter: Chesnay Schepler
            Assignee: Chesnay Schepler
             Fix For: 1.7.0

Latency metrics are currently organized as a histogram, which is significantly more expensive than other metric types.
Depending on the user's metric infrastructure a histogram in Flink is overkill; several metric backends explicitly discourage measuring histograms in the application itself. Instead only the raw latency data should be exposed.

We should add an option to expose latency not as a histogram but as a simple gauge that returns the latency based on the last received latency marker.

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