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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17057) Minor compactions should also drop page cache behind reads
Date Sat, 25 Feb 2017 07:24:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15884122#comment-15884122
] 

Hudson commented on HBASE-17057:
--------------------------------

SUCCESS: Integrated in Jenkins build HBase-1.3-JDK8 #125 (See [https://builds.apache.org/job/HBase-1.3-JDK8/125/])
HBASE-17057 Minor compactions should also drop page cache (Ashu (garyh: rev 37a49a0fa6889155d821be63d751884d62a0646e)
* (edit) hbase-common/src/main/resources/hbase-default.xml
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/Compactor.java


> Minor compactions should also drop page cache behind reads
> ----------------------------------------------------------
>
>                 Key: HBASE-17057
>                 URL: https://issues.apache.org/jira/browse/HBASE-17057
>             Project: HBase
>          Issue Type: Improvement
>          Components: Compaction
>            Reporter: Ashu Pachauri
>            Assignee: Ashu Pachauri
>             Fix For: 1.3.1
>
>         Attachments: HBASE-17057.V1.patch, HBASE-17057.V2.patch
>
>
> Long compactions currently drop cache behind reads/writes so that they don't pollute
the page cache but short compactions don't do that. The bulk of the data is actually read
during minor compactions instead of major compactions,  and thrashes the page cache since
it's mostly not needed. 
> We should drop page cache behind minor compactions too. 



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