[jira] [Commented] (HBASE-4349) Add metrics for monitored tasks and executor services

["Andrew Purtell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-4349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14692344#comment-14692344 ] 

Andrew Purtell commented on HBASE-4349:
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As part of this work it would make sense to convert many tasks performed by executors into monitored tasks. Might not need separate metrics for tasks and executors if we start with metrics for monitored tasks and make most threaded activity into monitored tasks.

> Add metrics for monitored tasks and executor services
> -----------------------------------------------------
>
>                 Key: HBASE-4349
>                 URL: https://issues.apache.org/jira/browse/HBASE-4349
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics
>    Affects Versions: 0.92.0
>            Reporter: Todd Lipcon
>              Labels: beginner
>
> Would be nice to add some metrics for each of the monitored tasks and executor services in the master and region server:
> - number of items in the queue
> - age of the oldest yet-unprocessed item (ie in the queue or currently being handled)
> - number of threads in the executor currently busy
> These would allow us to monitor better for cases where things get "stuck"



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