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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5533) Add more metrics to HBase
Date Mon, 26 Mar 2012 18:20:28 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13238647#comment-13238647
] 

Hadoop QA commented on HBASE-5533:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12519846/HBASE-5533-TRUNK-v6.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 6 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to introduce 1 new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

     -1 core tests.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.regionserver.TestSplitTransactionOnCluster
                  org.apache.hadoop.hbase.client.TestFromClientSide

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/1307//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/1307//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/1307//console

This message is automatically generated.
                
> Add more metrics to HBase
> -------------------------
>
>                 Key: HBASE-5533
>                 URL: https://issues.apache.org/jira/browse/HBASE-5533
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.92.2, 0.94.0
>            Reporter: Shaneal Manek
>            Assignee: Shaneal Manek
>            Priority: Minor
>         Attachments: BlockingQueueContention.java, HBASE-5533-0.92-v4.patch, HBASE-5533-TRUNK-v6.patch,
HBASE-5533-TRUNK-v6.patch, TimingOverhead.java, hbase-5533-0.92.patch, hbase5533-0.92-v2.patch,
hbase5533-0.92-v3.patch, hbase5533-0.92-v5.patch, histogram_web_ui.png
>
>
> To debug/monitor production clusters, there are some more metrics I wish I had available.
> In particular:
> - Although the average FS latencies are useful, a 'histogram' of recent latencies (90%
of reads completed in under 100ms, 99% in under 200ms, etc) would be more useful
> - Similar histograms of latencies on common operations (GET, PUT, DELETE) would be useful
> - Counting the number of accesses to each region to detect hotspotting
> - Exposing the current number of HLog files

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