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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6974) Metric for blocked updates
Date Thu, 18 Oct 2012 23:10:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13479462#comment-13479462
] 

Hudson commented on HBASE-6974:
-------------------------------

Integrated in HBase-TRUNK #3459 (See [https://builds.apache.org/job/HBase-TRUNK/3459/])
    HBASE-6974 Metric for blocked updates (Michael Drzal) (Revision 1399880)

     Result = FAILURE
larsh : 
Files : 
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/metrics/RegionServerMetrics.java

                
> Metric for blocked updates
> --------------------------
>
>                 Key: HBASE-6974
>                 URL: https://issues.apache.org/jira/browse/HBASE-6974
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Michael Drzal
>            Priority: Critical
>             Fix For: 0.94.3, 0.96.0
>
>         Attachments: 6974-v5.txt, HBASE-6974.patch, HBASE-6974-v2.patch, HBASE-6974-v3.patch,
HBASE-6974-v4.patch
>
>
> When the disc subsystem cannot keep up with a sustained high write load, a region will
eventually block updates to throttle clients.
> (HRegion.checkResources).
> It would be nice to have a metric for this, so that these occurrences can be tracked.

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