[jira] [Commented] (HADOOP-13747) Use LongAdder for more efficient metrics tracking

["Shilun Fan (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-13747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17803019#comment-17803019 ] 

Shilun Fan commented on HADOOP-13747:
-------------------------------------

Bulk update: moved all 3.4.0 non-blocker issues, please move back if it is a blocker. Retarget 3.5.0.

> Use LongAdder for more efficient metrics tracking
> -------------------------------------------------
>
>                 Key: HADOOP-13747
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13747
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: metrics
>            Reporter: Zhe Zhang
>            Assignee: Erik Krogen
>            Priority: Major
>         Attachments: HADOOP-13747.patch, benchmark_results
>
>
> Currently many metrics, including {{RpcMetrics}} and {{RpcDetailedMetrics}}, use a synchronized counter to be updated by all handler threads (multiple hundreds in large production clusters). As [~andrew.wang] suggested, it'd be more efficient to use the [LongAdder | http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/jsr166e/LongAdder.java?view=co] library which dynamically create intermediate-result variables.
> Assigning to [~xkrogen] who has already done some investigation on this.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)

---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: common-issues-help@hadoop.apache.org