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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3565) Add metrics to keep track of slow HLog appends
Date Wed, 11 Jan 2012 19:49:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13184325#comment-13184325
] 

Hudson commented on HBASE-3565:
-------------------------------

Integrated in HBase-TRUNK #2619 (See [https://builds.apache.org/job/HBase-TRUNK/2619/])
    HBASE-3565 Add metrics to keep track of slow HLog appends (Mubarak)

tedyu : 
Files : 
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/metrics/RegionServerMetrics.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java

                
> Add metrics to keep track of slow HLog appends
> ----------------------------------------------
>
>                 Key: HBASE-3565
>                 URL: https://issues.apache.org/jira/browse/HBASE-3565
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics, regionserver
>            Reporter: Benoit Sigoure
>            Assignee: Mubarak Seyed
>              Labels: monitoring
>             Fix For: 0.94.0
>
>         Attachments: HBASE-3565.trunk.v1.patch
>
>
> Whenever an edit takes too long to be written to an HLog, HBase logs a warning such as
this one:
> {code}
> 2011-02-23 20:03:14,703 WARN org.apache.hadoop.hbase.regionserver.wal.HLog: IPC Server
handler 21 on 60020 took 15065ms appending an edit to hlog; editcount=126050
> {code}
> I would like to have a counter incremented each time this happens and this counter exposed
via the metrics stuff in HBase so I can collect it in my monitoring system.

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