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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13980) Distinguish blockedFlushCount vs unblockedFlushCount when tuning heap memory
Date Thu, 02 Jul 2015 01:25:09 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14611300#comment-14611300
] 

Hudson commented on HBASE-13980:
--------------------------------

FAILURE: Integrated in HBase-1.3 #31 (See [https://builds.apache.org/job/HBase-1.3/31/])
HBASE-13980 Distinguish blockedFlushCount vs unblockedFlushCount when tuning heap memory (Abhilash)
(tedyu: rev a883bb4e5488d19a7b5d96fd926beacc9086dd6c)
* hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHeapMemoryManager.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/DefaultHeapMemoryTuner.java


> Distinguish blockedFlushCount vs unblockedFlushCount when tuning heap memory
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-13980
>                 URL: https://issues.apache.org/jira/browse/HBASE-13980
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Abhilash
>            Priority: Minor
>             Fix For: 2.0.0, 1.3.0
>
>         Attachments: HBASE-13980-v1.patch, HBASE-13980-v1.patch, HBASE-13980.patch, HBASE-13980.patch
>
>
> Currently DefaultHeapMemoryTuner doesn't distinguish blockedFlushCount vs unblockedFlushCount.
> In its tune() method:
> {code}
>     long totalFlushCount = blockedFlushCount+unblockedFlushCount;
>     rollingStatsForCacheMisses.insertDataValue(cacheMissCount);
>     rollingStatsForFlushes.insertDataValue(totalFlushCount);
> {code}
> Occurrence of blocked flush indicates that upper limit for memstore is not sufficient.
> We should either give blockedFlushCount more weight or, take tuning action based on blockedFlushCount
directly.
> See discussion from tail of HBASE-13876.



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