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https://issues.apache.org/jira/browse/HBASE-16549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15986152#comment-15986152
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stack commented on HBASE-16549:
-------------------------------

Now I understand which 'description' you were referring to... Yeah, that is 
oversight in our new metrics API.

I like this comment:

{code}
        63           * NOTE: Please refer to HBASE-9774 and HBASE-14282. Based 
on these two issues, HBase is
64           * moving away from using Hadoop's metric2 to having independent 
HBase specific Metrics. Use
65           * {@link BaseSourceImpl#registry} to register the new metrics.
66           *
67           * TODO: As of now, Metrics description cannot be added/ registered 
with
68           * {@link BaseSourceImpl#registry}. As metric names are unambiguous 
but concise, descriptions of
69           * metrics need to be made available to the user somewhere.
{code}

I skimmed this. I think this is a good start. Lets get it in. Waiting on 
[~appy] comments....

> Procedure v2 - Add new AM metrics
> ---------------------------------
>
>                 Key: HBASE-16549
>                 URL: https://issues.apache.org/jira/browse/HBASE-16549
>             Project: HBase
>          Issue Type: Sub-task
>          Components: proc-v2, Region Assignment
>    Affects Versions: 2.0.0
>            Reporter: Matteo Bertozzi
>            Assignee: Umesh Agashe
>             Fix For: 2.0.0
>
>         Attachments: HBASE-16549-hbase-14614.v1.patch, 
> HBASE-16549-hbase-14614.v2.patch
>
>
> With the new AM we can add a bunch of metrics
>  - assign/unassign time
>  - server crash time
>  - grouping related metrics? (how many batch we do, and similar?)



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