Keith Turner commented on ACCUMULO-4500:

I am in favor of making a configurable per table function.  The function would 
take in key values and emit counts.  The emitted counts would build the 
histogram.   Not configuring a function would turn it off.  General counts 
could be used by compaction strategies when making decisions.  This would be 
useful for ACCUMULO-1266.  

> Implement visibility histograms as a table feature
> --------------------------------------------------
>                 Key: ACCUMULO-4500
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4500
>             Project: Accumulo
>          Issue Type: New Feature
>          Components: client, tserver
>            Reporter: Josh Elser
> Add support to quickly extract a histogram of all of the visibilities stored 
> in an Accumulo table.
> https://lists.apache.org/thread.html/df5e764362a95277344fd2731a432e9fafc60595e7d30015d9a56b9c@%3Cdev.accumulo.apache.org%3E

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