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https://issues.apache.org/jira/browse/FLINK-4840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582332#comment-15582332
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Stephan Ewen commented on FLINK-4840:
-------------------------------------
To me, throughput and latency could be in the I/O scope, because throughput is
the number of records in/out per time.
> Introduce an OperatorSystemMetricGroup
> --------------------------------------
>
> Key: FLINK-4840
> URL: https://issues.apache.org/jira/browse/FLINK-4840
> Project: Flink
> Issue Type: Improvement
> Components: Metrics
> Reporter: zhuhaifeng
> Assignee: zhuhaifeng
> Priority: Minor
> Fix For: 1.2.0
>
>
> There will introduces the OperatorSystemMetricGroup, which encapsulates the
> insantiation of TPS meter, lantency/proc_time_cost histograms.
> Operator related System metrics are not instantiated directly by the specific
> Operator, but instead within the OperatorSystemMetricGroup contained in the
> respective OperatorMetricGroup. They are then later accessed by relevant
> components(maybe different places), instead of instantiated them identically
> with static name constants. Other system scope metrics (maybe
> delay/queue_in/queue_out) can add into the OperatorSystemMetricGroup some
> later.
> TPS: collect records per second(StreamSource), processed elements per
> second(other operator)
> lantency/proc_time_cost : collect an record time cost(StreamSource),
> processed an element time cost (other operator)
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