Michael Browning updated MESOS-4760:
    Assignee:     (was: Michael Browning)

> Expose metrics and gauges for fetcher cache usage and hit rate
> --------------------------------------------------------------
>                 Key: MESOS-4760
>                 URL: https://issues.apache.org/jira/browse/MESOS-4760
>             Project: Mesos
>          Issue Type: Improvement
>          Components: fetcher, statistics
>            Reporter: Michael Browning
>            Priority: Minor
>              Labels: features, fetcher, statistics, uber
> To evaluate the fetcher cache and calibrate the value of the 
> fetcher_cache_size flag, it would be useful to have metrics and gauges on 
> agents that expose operational statistics like cache hit rate, occupied cache 
> size, and time spent downloading resources that were not present.

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