[jira] [Created] (KUDU-2056) Expose a metric for how much a tablet needs to be compacted

["Jean-Daniel Cryans (JIRA)" <ji...@apache.org>]

Jean-Daniel Cryans created KUDU-2056:
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             Summary: Expose a metric for how much a tablet needs to be compacted
                 Key: KUDU-2056
                 URL: https://issues.apache.org/jira/browse/KUDU-2056
             Project: Kudu
          Issue Type: Improvement
          Components: tablet
            Reporter: Jean-Daniel Cryans


Now that the maintenance manager is fast at scheduling tasks, I've seen clusters running 1.4 that are churning through compactions at a high rate with seemingly no end in sight. At least it *feels* like it, but there's no easy way to verify.

I think it would be good to have some measure of how "uncompacted" a tablet is. Todd thinks we could just use the average "height" of what's seen on the "Rowset Layout Diagram" page.



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