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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14693) Add client-side metrics for received pushback signals
Date Mon, 26 Oct 2015 21:12:28 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14975086#comment-14975086
] 

Andrew Purtell commented on HBASE-14693:
----------------------------------------

Thanks for picking this up [~chenheng]!

Histograms of the server side feedback values and the other information they provide (like
number of samples) is a great start. To complete the picture we should have metrics on the
use of DelayingRunner: count of use of normal runners, count of use of delaying runners, histogram
of delaying runner delay intervals. 

> Add client-side metrics for received pushback signals
> -----------------------------------------------------
>
>                 Key: HBASE-14693
>                 URL: https://issues.apache.org/jira/browse/HBASE-14693
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>         Attachments: HBASE-14693.patch, HBASE-14693_v1.patch, HBASE-14693_v2.patch
>
>
> HBASE-12911 added client side metrics. HBASE-5162 added a mechanism for sending advisory
backpressure signals to clients when the server is heavily loaded, and HBASE-12702 and subtasks
backported this to all active branches. Add client-side metrics for received pushback signal.




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