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From "Ashu Pachauri (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17057) Minor compactions should also drop page cache behind reads
Date Thu, 01 Dec 2016 03:26:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17057?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashu Pachauri updated HBASE-17057:
----------------------------------
    Attachment: HBASE-17057.V1.patch

V1: Adds config for dropping page cache behind major and minor compactions. Both are enabled
by default.

> 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
>         Attachments: HBASE-17057.V1.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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