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https://issues.apache.org/jira/browse/CASSANDRA-482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12763730#action_12763730
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Jonathan Ellis commented on CASSANDRA-482:
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+    public int getRunningTasks();

This is not worth the overhead in the commitlog executor.

+    public int getPoolSize();

+    public long getCompletedTasks();

What actionable information do these produce?  I.e., what decision can you now 
make with this data that you could not before?

> Expose out additional metrics for the thread pools: active threads, pool 
> size, and completed tasks
> --------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-482
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-482
>             Project: Cassandra
>          Issue Type: New Feature
>    Affects Versions: 0.5
>            Reporter: Sammy Yu
>            Assignee: Sammy Yu
>         Attachments: 
> 0001--CASSANDRA-482-Expose-out-additional-metrics-for-th.patch
>
>
> It would be nice to expose out additional metrics in the threadpools via 
> nodeprobe's tpstats to understand how busy the system is.

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