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From "Mubarak Seyed (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3565) Add a metric to keep track of slow HLog appends
Date Fri, 23 Dec 2011 00:35:30 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175200#comment-13175200
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Mubarak Seyed commented on HBASE-3565:
--------------------------------------

slowHLogAppendCount
slowHLogAppendTime
-slowHLogAppendMinTime-
-slowHLogAppendAvgTime-
-slowHLogAppendMaxTime-

Waiting for corporate approval to contribute this patch. Thanks.
                
> Add a metric 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
>              Labels: monitoring
>
> 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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