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https://issues.apache.org/jira/browse/HBASE-3565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13183904#comment-13183904
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stack commented on HBASE-3565:
------------------------------
Patch looks good to me. I think the tsdb lads are going to come through and
make us undo resetting of metrics; they argue that should be done out in the
monitoring system.... let it figure intervals to measure across.. hbase should
just keep outputting counts and times. But lets commit this meantime.
> 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
> 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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